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NIMS(Nepal Index Of Medical Specialities) has been design to provide information on drugs that are marketed in Nepal by Pharma company from around the world .

NIMS DRUGS DIRECTORY

NIMS(Nepal Index Of Medical Specialities) has been design to provide information on drugs that are marketed in Nepal by Pharma company from around the world .

NIMS DRUGS DIRECTORY

NIMS(Nepal Index Of Medical Specialities) has been design to provide information on drugs that are marketed in Nepal by Pharma company from around the world .

NIMS DRUGS DIRECTORY

NIMS(Nepal Index Of Medical Specialities) has been design to provide information on drugs that are marketed in Nepal by Pharma company from around the world .

NIMS DRUGS DIRECTORY

NIMS(Nepal Index Of Medical Specialities) has been design to provide information on drugs that are marketed in Nepal by Pharma company from around the world .

Tuesday, December 30, 2014

A 26-year-old woman travels to a rural area of Nepal.

A 26-year-old woman travels to a rural area of Nepal. Three days after arrival, she develops watery diarrhea with severe abdominal cramping.



She reports two unformed stools daily for the past 2 days. She has noticed no blood in the stool and has not experienced a fever.



What is the most likely cause of the patient’s illness?

A. Campylobacter jejuni
B. Enterotoxigenic Escherichia coli
C. Giardia lamblia
D. Norovirus
E. Shigella spp.

The answers is B  Traveler’s diarrhea is common among individuals traveling to rural affecting 25% to 50% of travelers to these areas. Most traveler’s diarrhea begins within
3 to 5 days after arrival and is self-limited, lasting 1 to 5 days. Most individuals acquire
traveler’s diarrhea after consuming contaminated food or water. Although some organisms
have a geographic association, enterotoxigenic and enteroaggregative Escherichia
coli are found worldwide and are the most common causes of traveler’s diarrhea.

In Asia, Campylobacter jejuni is also common. This presentation would be uncommon for
Shigella spp. because it most frequently causes bloody diarrhea. Norovirus is associated
with a more profuse diarrhea. It has been the causative organism in large outbreaks on
cruise ships. Giardia lamblia is a parasite that is responsible for 5% or less of traveler’s
diarrhea.

Monday, December 29, 2014

Pellagra

Pellagra

Definition: 

Pellagra is a disorder caused by defi ciency of nicotinic acid (niacin, vitamin B3) or its precursor, tryptophan.


CAUSE

● Dietary defi ciency (alcoholism, malabsorption, anorexia nervosa, socioeconomic deprivation)
● Carcinoid tumors (excessive use of tryptophan, which produces serotonin)


PHYSICAL FINDINGS AND CLINICAL PRESENTATION

● The skin eruption is photosensitive. An initial, painful, sunburn-like erythema subsides to leave a dusky brownish discoloration, with a dry scaly appearance .
● Other features sometimes present include cheilosis, glossitis, angular stomatitis, and oral or perianal sores.


TREATMENT

Legs and feet of a patient with niacin deficiency. A, Before therapy. B, After therapy.
● Nutritional supplementation with niacin will improve the appearance of skin lesions .

Saturday, December 27, 2014

A 42-year-old man with poorly controlled diabetes (HbA1c, 13.3%) presents with thigh pain and fever over several weeks.

A 42-year-old man with poorly controlled diabetes (HbA1c, 13.3%) presents with thigh pain and fever over several weeks.



Physical examination reveals erythema and warmth over the thigh with notable woody, nonpitting
edema. There are no cutaneous ulcers. CT of the thigh reveals several abscesses located between the muscle fibers of the thigh. Orthopedics is consulted to drain and culture the abscesses.

Which of the following is the most likely pathogen?

A. Clostridium perfringens
B. Group A streptococcus
C. Polymicrobial flora
D. Staphylococcus aureus
E. Streptococcus milleri

The answer is D.  

This patient has infectious pyomyositis, a disease of the tropics and of immunocompromised hosts such as patients with poorly controlled diabetes mellitus or AIDS. The pathogen is usually Staphylococcus aureus. Management includes aggressive debridement, antibiotics, and attempts to reverse the patient’s immunocompromised status.

 Clostridium perfringens may cause gas gangrene, particularly in devitalized tissues. Streptococcal infections may cause cellulitis or an aggressive fasciitis, but the presence of abscesses in a patient with poorly controlled diabetes makes staphylococcal infection more likely.

Polymicrobial infections are common in diabetic ulcers, but in this case, the imaging and physical examination show intramuscular abscesses.

E. Staphylococcus epidermidis

Which of the following organisms is most likely to cause infection of a shunt implanted for the treatment of hydrocephalus?

A. Bacteroides fragilis
B. Corynebacterium diphtheriae
C. Escherichia coli
D. Staphylococcus aureus
E. Staphylococcus epidermidis

The answer is E. Probably because of its ubiquity and ability to stick to foreign
surfaces, Staphylococcus epidermidis is the most common cause of infections of central
nervous system shunts as well as an important cause of infections on artificial heart valves
and orthopedic prostheses.

Corynebacterium spp. (diphtheroids), similar to S. epidermidis,colonize the skin. When these organisms are isolated from cultures of shunts, it is often difficult to be sure if they are the cause of disease or simply contaminants. Leukocytosis in cerebrospinal fluid, consistent isolation of the same organism, and the character of a patient’s symptoms are all helpful in deciding whether treatment for infection is indicated.

Friday, December 26, 2014

ECG: Stenosis of the left anterior descending artery


Patient with chest pain :

Stenosis of the left anterior descending artery


The electocardiogram reveals anterolateral T-wave inversions with biphasic lateral T waves. This finding (Wellens'’ syndrome) is associated with severe stenosis of the left anterior descending artery. Coronary angiography showed stenosis of 95% of the mid-–left anterior descending artery, which was successfully treated with a drug-eluting stent.

Wednesday, December 24, 2014

A 19-year-old man comes to clinic complaining of 2 days of severe dysuria and urethral discharge.

A 19-year-old man comes to clinic complaining of 2 days of severe dysuria and urethral discharge.

Urine analysis shows pyuria. He reports unprotected sexual contact with a new partner within the past week. DNA
probe is positive for N. gonorrhea.

Uretheral discharge with pus


Which of the following is the most effective therapy?

A. Intravenous ceftriaxone
B. Intramuscular penicillin
C. Oral azithromycin
D. Oral cefixime
E. Oral levofloxacin

The answer is D. Because of emerging resistance, treatment recommendations for gonorrhea require frequent updating. Fluoroquinolones and penicillin are no longer generally recommended in the United States because of resistance. Current effective therapies use single-dose therapies to maximize adherence.

Oral cefixime or intramuscular ceftriaxone are effective for urethritis, cervicitis, and proctitis. Azithromycin is no longer effective for gonorrhea because of resistance, but it should be administered because of the presumption of chlamydial co-infection. Doxycycline also an option for co-treatment in nonpregnant women. Patients with uncomplicated infection who receive therapy do not require a test of cure. Patients should be instructed to contact sexual partners for screening and therapy.

Recent studies have demonstrated that the provision of medications or prescriptions to treat gonorrhea and chlamydia in sexual partners diminishes the risk of reinfection in the affected patient.


Tuesday, December 23, 2014

PEUTZ-JEGHERS SYNDROME

PEUTZ-JEGHERS SYNDROME

darkly pigmented macular lesions onthe lips.

DEFINITION

This autosomal dominant disease is characterized by GI polyps and pigmented macules with involvement of the perioral skin, lips Fig.  buccal mucosa, and hands and feet, particularly
the palms, soles, fi ngers, and toes.

● Lesions are brown or black and usually measure less than 5 mm in diameter. Skin lesions may fade at puberty but mucosal lesions tend to persist.


Monday, December 22, 2014

DARIER’S DISEASE

DARIER’S DISEASE


Darier’s disease. Lesions may be induced by stress, heat, sweating,and maceration.

● Rare skin disorder usually transmitted in an autosomal dominant pattern.

● It is characterized by abnormal keratinocyte adhesion.

● The lesions are frequently itchy and characterized by greasy, crusted, keratotic yellow-brown papules and plaques found particularly on the scalp, forehead, ears, nasolabial folds, upper chest, back, and supraclavicular fossae.

● Lesions may be induced or exacerbated by stress, heat, sweating, and maceration (Fig.)

● Nail changes are a particularly important diagnostic feature. Longitudinal white or red streaks (often both), some of which terminate in a small nick on the free margin, are
typical fi ndings (Fig. ).


● Patients with Darier’s disease are susceptible to bacterial (particularly Staphylococcus aureus), dermatophytic, and viral infections.

● Diagnosis: skin biopsy reveals focal acantholytic dyskeratosis.

● Treatment: emollients, cool cotton clothing, topical or oral retinoids, topical 5-fl uorouracil

Saturday, December 20, 2014

SEBORRHEIC KERATOSIS

SEBORRHEIC KERATOSIS

Leser-Trélat sign (A, B). The sudden onset of numerous seborrheic keratoses may indicate an underlying malignant visceral neoplasm


SEBORRHEIC KERATOSIS
● Seborrheic keratosis are common skin lesions, developing in middle-aged and older adults.

● They are frequently numerous and appear as sharply delineated, round or oval, fl esh-colored or brown-black warty
plaques with a rather greasy texture (Fig.). Although they may be found anywhere on the body (except palms
and soles), they are particularly common on the face, chest, and back.

● A sudden onset of numerous seborrheic keratoses (Leser- Trélat sign)has been reported in association with
internal malignancy, most commonly adenocarcinoma of the stomach. It has also been described after treatment with
chemotherapy.

● Treatment involves curettage and cautery, cryotherapy, chemical peels, and laser therapy.

Friday, December 19, 2014

A 22-year-old woman presents with diffuse arthralgias and morning stiffness in her hands, knees, and wrists.

A 22-year-old woman presents with diffuse arthralgias and morning stiffness in her hands, knees, and wrists.

Two weeks earlier, she had a self-limited febrile illness notable for a red facial rash and lacy reticular rash on her extremities. 

On examination, her bilateral wrists, metacarpophalangeal joints, and proximal interphalangeal joints are warm and slightly boggy. 

Which of the following tests is most likely to reveal her diagnosis?

A. Antinuclear antibody
B. Chlamydia trachomatis ligase chain reaction of the urine
C. Joint aspiration for crystals and culture
D. Parvovirus B19 IgM
E. Rheumatoid factor

ans :https://nimsdrug.blogspot.com/
--DrSudeepKC

The answer is D.  The most likely diagnosis based on the patient’s antecedent illness with a facial rash is parvovirus infection. Arthropathy is uncommon in childhood parvovirus infection but may cause a diffuse symmetric arthritis in up to 50% of adults.

This corresponds to the immune phase of illness when immunoglobulin M antibodies are developed. The arthropathy syndrome is more common in women than men. The distribution of affected joints is typically symmetric, most commonly in the small joints of the hands and less commonly the ankles, knees, and wrists. Occasionally the arthritis persists over months and can mimic rheumatoid arthritis. Rheumatoid factor can be detected in serum. Parvovirus B19V infection may trigger rheumatoid disease in some patients and has been associated with juvenile idiopathic arthritis. Reactive arthritis caused by Chlamydia spp. or a list of other bacterial pathogens tends to affect large joints such as the sacroiliac joints and spine. It is also sometimes accompanied by uveitis and urethritis. The large number of joints involved with a symmetric distribution argues against crystal or septic arthropathy. 

Wednesday, December 17, 2014

Milia

Milia



● Milia are common superfi cial keratinous cysts that present as white or yellow dome-shaped nodules measuring 1 to 3 mm in diameter. Fig Eccrine hidradenoma. This lesion presents as a solitary nodule, most often on the head and neck or limbs.

● They may represent primary lesions when no cause can be identifi ed or may be secondary variants following skin trauma or other injury.


● Primary milia are seen in up to 50% of newborns and present on the face, upper trunk, and extremities. They typically regress spontaneously. Children and adults can also be affected.

● These lesions are most often apparent on the face (forehead,eyelids, and cheeks; Fig. 25–9) and the external genitalia.

● Diagnostic investigation: microbiology swab for bacteria and yeasts, histology

● Treatment: topical antiseptics, oatmeal baths, frequent showering, topical corticosteroids, systemic antibiotics.

Sunday, December 14, 2014

A 25-year-old woman presents with 1 day of fever to 38.3°C (101°F); sore throat; dysphagia; and a...

A 25-year-old woman presents with 1 day of fever to 38.3°C (101°F); sore throat; dysphagia; and a
number of grayish- white papulovesicular lesions on the soft palate, uvula, and anterior pillars of the tonsils .

. The patient is most likely infected with which of the following?

A. Candida albicans

B. Coxsackievirus

C. Herpesvirus

D. HIV

E. Staphylococcus lugdunensis


The answer is B.These lesions are diagnostic of herpangina, which is caused by coxsackievirus A. They are typically round and discrete, which helps differentiate them from thrush caused by Candida spp. Unlike herpes simplex virus stomatitis, herpangina lesions are not associated with gingivitis. Lesions are typically concentrated in the posterior portion of the mouth. Herpangina usually presents with dysphagia, odynophagia, and fever; these lesions can persist for several weeks. The lesions do not ulcerate.

Thursday, December 11, 2014

A 17-year-old woman presents to the clinic complaining of vaginal itchiness and malodorous discharge.

A 17-year-old woman presents to the clinic complaining of vaginal itchiness and malodorous discharge.

She is sexually active with multiple partners, and she is interested in getting tested for sexually transmitted diseases.

A wet-mount microscopic examination is performed, and trichomonal parasites are identified.

Which of the following statements regarding trichomoniasis is true?

A. A majority of women are asymptomatic.
B. No treatment is necessary because the disease is self-limited.
C. The patient’s sexual partner need not be treated.
D. Trichomoniasis can only be spread sexually.
E. Trichomoniasis is 100% sensitive to metronidazole







The answer is D. Trichomoniasis is transmitted via sexual contact with
an infected partner. Many men are asymptomatic but may have symptoms of urethritis,
epididymitis, or prostatitis. Most women have symptoms of infection that include
vaginal itching, dyspareunia, and malodorous discharge.

These symptoms do not distinguish Trichomonas infection from other forms of vaginitis, such as bacterial vaginosis.

Trichomoniasis is not a self-limited infection and should be treated for symptomatic and public health reasons. Wet-mount examination for motile trichomonads has a sensitivity of 50% to 60% in routine examination. Direct immunofluorescent antibody staining of secretions is more sensitive and can also be performed immediately.

Culture is not widely available and takes 3 to 7 days. Treatment should consist of metronidazole either as a single 2-g dose or 500-mg doses twice daily for 7 days; all sexual partners should
be treated. Trichomoniasis resistant to metronidazole has been reported and is managed
with increased doses of metronidazole or with tinidazole.

A “kissing burn” occurs:

A “kissing burn” occurs:



a. At extensor surfaces in electrical exposure when the current causes flexion at a joint, protecting that area but leaving the exposed extensor surfaces at greater risk for damage.

b. At flexor surfaces in electrical exposure when the current causes flexion at a joint, and the moisture in the flexor crease leads to an arc burn and extensive deep tissue damage.

c. When a child “sucks” an electrical outlet.

d. When a child bites an electric cord.

e. When lightning “kisses” the skin, leaving a typical fernlike pattern.


kissing burn


The answer is b. A peculiar type of burn associated with electrical injury is the kissing burn, which occurs at the flexor creases. As the current causes flexion of the extremity, the skin of the flexor surfaces at the joints touches. Combined with the moist environment that often occurs at the flexor areas, the electric current may arc across the flexor crease, causing arc burns on both flexor surfaces and extensive underlying tissue damage.

Tuesday, December 9, 2014

2-year-old girl whose parents brought her to the emergency department

You are evaluating a 2-year-old girl whose parents brought her to the emergency department after she ingested one pill. After setting up your safety net, you observe her for 6 hours; she is playful and eating normally. 


It would be safe to discharge her if she ingested:

a. Methadone.
b. A sulfonylurea.
c. Citalopram.
d. Iron.
e. Diphenoxylate/atropine (Lomotil).


The answer is d. It is important to know the medications that could be toxic in small quantities (such as one pill or a few drops) in a child. If a child has ingested one of these medications or even if clinical suspicion is high that the child may have ingested one of these medications, the patient must be admitted for 24 hours of observation.


Opioids, especially long-acting preparations like methadone, can lead to lethal respiratory depression and apnea if asmall child ingests one pill. Ingestion of one tablet of sustained release calcium channel and beta-blockers has caused death in children. Long-acting preparations require observation as the onset of symptoms may be delayed.

Sulfonylureas, oral hypoglycemic agents, may cause severe life-threatening hypoglycemia. Evaluation includes frequent blood glucose monitoring for 24 hours. Citalopram and escitalopram in sustained release preparations have been reported to cause seizures, QT prolongation, and torsades de pointes. Children who have ingested one pill need to be monitored for 24 hours. Other substances that are potentially lethal in very small doses include cyclic antidepressants, benzocaine, clonidine, phenothiazines, and theophylline. A few drops of oil of wintergreen (methyl salicylate), methanol, or ethylene glycol can also be lethal in a child. Lomotil is a combination of an opioid and atropine; while the respiratory depression from diphenoxylate can be treated with naloxone, there are
numerous case reports of delayed onset of symptoms even after an extended period of symptom-free observation.


Children may also exhibit delayed onset of atropine intoxication, and death has been reported with ingestion of one pill. Iron overdose can be life threatening, but most poison centers do not make hospital referrals until the ingested dose is greater than 20–60 mg/kg. The amount of iron in vitamins and other preparation varies, but a typical prenatal vitamin contains 65 mg of iron. Iron toxicity is often described in five stages. Stage 1 is the initial symptoms of acute iron poisoning including nausea, vomiting, abdominal pain, and diarrhea. This is followed by the latent stage lasting 6–24 hours. The third stage is the “shock” stage and occurs typically 12–24 hours later.

The fourth stage is hepatotoxicity. The fifth stage includes delayed sequelae and includes gastric outlet obstruction and strictures. If a child presents to the hospital and has no symptoms of iron poisoning, then it is safe to discharge the patient home after 6 hours of observation.

Sunday, December 7, 2014

A lady is contemplating a trekking trip to Nepal at elevations between 2500 and 3000 m.

A lady is contemplating a trekking trip to Nepal at elevations between 2500 and 3000 m.
trekking Nepal


Five years ago, while skiing at Telluride (altitude, 2650 m), she recalls having headache, nausea, and fatigue within 1 day of arriving that lasted about 2–3 days.

All of the following are true regarding the development of acute mountain sickness in this patient EXCEPT:


A. Acetazolamide starting 1 day before ascent is effective in decreasing the risk.
B. Gingko biloba is not effective in decreasing the risk.
C. Gradual ascent is protective.
D. Her prior episode increases her risk for this trip.
E. Improved physical conditioning before the trip decreases the risk.

The answer is E. Whereas acute mountain sickness (AMS) is the benign form of altitude illness, high-altitude cerebral edema (HACE) and high-altitude pulmonary edema (HAPE) are life threatening. Altitude illness is likely to occur above 2500 m but has been documented even at 1500–2500 m. The acclimation to altitude includes hyperventilation in response to the reduced inspired PO2 initially followed by increased erythropoietin and 2,3-bisphosphoglycerate.


AMS is characterized by nonspecific symptoms (headache, nausea, fatigue, and dizziness) with a paucity of physical findings developing 6–12 hours after ascent to a high altitude. AMS must be distinguished from exhaustion, dehydration, hypothermia, alcoholic hangover, and hyponatremia.

The most important risk factors for the development of altitude illness are the rate of ascent and a history of high-altitude illness. Exertion is a risk factor, but lack of physical fitness is not. One protective factor in AMS is high-altitude exposure during the preceding 2 months. Children
and adults seem to be equally affected, but people greater than 50 years of age may be less
likely to develop AMS than younger people. Most studies reveal no gender difference in
AMS incidence.

Sleep desaturation—a common phenomenon at high altitude—is associated
with AMS. Gradual ascent is the best approach to prevent AMS. Acetazolamide or
dexamethasone beginning 1 day before ascent and continuing for 2–3 days is effective if
rapid ascent is necessary. A double-blind placebo-controlled trial demonstrated no benefit
on AMS from gingko biloba. Mild cases of AMS can be treated with rest; more serious
cases are treated with acetazolamide and oxygen.

Descent is therapeutic in all serious cases, including HACE and HAPE. Patients who have recovered from mild cases of AMS may reascend carefully after recovery; patients with HACE should not.

Saturday, December 6, 2014

Which of the following is the most common cause of death from poisoning?

Which of the following is the most common cause of death from poisoning?

A. Acetaminophen
B. Carbon monoxide
C. Chlorine gas
D. Insecticide
E. Tricyclic antidepressants

The answer is B. Most are acute, accidental (unintentional), involve a single agent, occur
in the home, result in minor or no toxicity, and involve children younger than 6 years of
age. Pharmaceuticals are involved in 47% of exposures and 84% of serious or fatal poisonings.
Unintentional exposures can result from the improper use of chemicals at work or
play; label misreading; product mislabeling; mistaken identification of unlabeled chemicals;
uninformed self-medication; and dosing errors by nurses, pharmacists, physicians,
parents, and elderly adults. Excluding the recreational use of ethanol, attempted suicide
(deliberate self-harm) is the most common reported reason for intentional poisoning.
Recreational use of prescribed and over-the-counter drugs for psychotropic or euphoric
effects (abuse) or excessive self-dosing (misuse) are increasingly common and may also
result in unintentional self-poisoning. About 20–25% of exposures require bedside health
professional evaluation, and 5% of all exposures require hospitalization. Poisonings
account for 5–10% of all ambulance transports, emergency department visits, and intensive
care unit admissions. Up to 30% of psychiatric admissions are prompted by attempted
suicide via overdosage. Overall, the mortality rate is low: fewer than 1% of all exposures.
It is much higher (1–2%) in hospitalized patients with intentional (suicidal) overdose,
who account for the majority of serious poisonings. Acetaminophen is the pharmaceutical
agent most often implicated in fatal poisoning. Overall, carbon monoxide is the leading
cause of death from poisoning, but this is not reflected in hospital or poison center statistics
because patients with such poisoning are typically dead when discovered and are
referred directly to medical examiners.

Friday, December 5, 2014

A 32-year-old woman presents to her physician complaining of hair loss.

A 32-year-old woman presents to her physician complaining of hair loss. She is currently 10 weeks postpartum after delivery of a normal healthy baby girl.

She admits to having increased stress and sleep loss because her child has colic.



She also has not been able to nurse because of poor milk production.

On examination, the patient’s hair does not appear to have decreased density. With a gentle tug, more than 10 hairs come out but are not broken and all appear normal. There are no scalp lesions. What do you recommend for this patient?

A. Careful evaluation of the patient’s hair care products for a potential cause
B. Reassurance only
C. Referral for counseling for trichotillomania
D. Treatment with minoxidil
E. Treatment with topical steroids


The answer is B. This patient presents with complaints of diffuse hair loss that has been associated with increased stress as well as hormonal changes after pregnancy and delivery. On physical examination, there is diffuse shedding of normal hairs without scalp lesions or scarring consistent with a diagnosis of telogen effluvium. Telogen effluvium occurs when a stressor causes the typical asynchronous hair growth pattern to become synchronous. This can occur from physical or mental stress (high fever, severe infection) or hormonal changes. When the hair growth becomes more synchronous, more hairs enter the telogen (dying) phase at the same time. The patient may present with complaints of significant hair loss, but hair density to the examiner may appear normal. Broken hairs are not observed, and gentle pulling of the hair results in more than four hairs falling
out. Telogen effluvium is reversible without treatment, and this patient has identifiable
stressors that are related to the cause. Reassurance and observation are all that are recommended.
Some medications can cause telogen effluvium. If identified, these should be
discontinued. In addition, both hyper- and hypothyroidism can lead to the condition.
One should consider evaluation for these and other metabolic disorders if the condition
does not reverse or the patient has additional symptoms.

Other causes of nonscarring alopecia include androgenic alopecia, alopecia areata,
tinea capitis, and traumatic alopecia. Androgenic alopecia is the cause of male and female
pattern baldness. It does not typically result from androgen excess. Rather, it is associated
with an increased sensitivity of the affected hairs to the effects of androgens. Androgenic
alopecia can be treated with minoxidil, finasteride, or hair transplants. Alopecia areata
is a condition of focal hair loss measuring about 2–5 cm in diameter. The surrounding
tissue demonstrates increased T lymphocytes, and the treatment includes intralesional
glucocorticoids or topical anthralin or tazarotene. Tinea capitis is also usually a focal area
of hair loss related to an underlying superficial fungal infection. However, in severe cases,
large plaques and pustules can develop. Treatment with oral griseofulvin or terbinafine
with topical selenium sulfide or ketoconazole is usually effective in treating the disease.
Traumatic alopecia presents with multiple broken hairs at sites of increased stress related
to the use of hair care products, including rubber bands, curlers, or chemicals. It can also
result from trichotillomania. Discontinuation of any offending practice or agent is all that
is required to return the hair to normal. Counseling is typically required for those with
trichotillomania.

Thursday, December 4, 2014

CHARCOT-MARIE-TOOTH DISEASE

CHARCOT-MARIE-TOOTH DISEASE 









DEFINITION
Charcot-Marie-Tooth disease is a heterogeneous group of noninflammatory inherited peripheral neuropathies. It is the most common inherited neuromuscular disorder.

PHYSICAL FINDINGS AND CLINICAL PRESENTATION

● Variable presentation from family to family, but affected individuals in a family tend to have similar symptomatology
● Usually, gradual onset, with slowly progressive disorder
● Foot deformity producing a high arch (cavus) and hammertoes
● Atrophy of the lower legs (see Fig.) producing a storklike appearance (muscle wasting does not involve the upper legs
● Nerve enlargement (see Fig.)
● Sensory loss or other neurologic signs, although the sensory involvement is usually mild
● Scoliosis
● Decreased proprioception that often interferes with balance and gait
● Painful paresthesias
● In late cases, possible involvement of hands (see Fig.)
● Absence of deep tendon refl exes (DTRs) in many cases
● Poorly healing foot ulcers in some patients


CAUSE
● Chronic segmental demyelination of peripheral nerves, with hypertrophic changes caused by remyelination

DIFFERENTIAL DIAGNOSIS
● Other inherited neuropathies
● Toxic, metabolic, and nutritional polyneuropathies


WORKUP
● The early onset, slow progression, and familial nature of the disorder are usually suffi cient to establish diagnosis.
● Electrophysiologic studies are often diagnostic and may also be helpful in defi ning various subtypes of this group of neuropathies.
● Occasionally, muscle and nerve (sural) biopsy may be required

TREATMENT
● Genetic counseling
● Supportive physical therapy and occupational therapy
● Prevention of injury to limbs with diminished sensibility
● Bracing
● Occasionally, surgery to add stability and restore a plantigrade foot

Wednesday, December 3, 2014

Which of the following classes of medicines has been linked to the occurrence of hip fractures in elderly adults?

Which of the following classes of medicines has been linked to the occurrence of hip fractures in elderly adults?

A. Benzodiazepines
B. Opiates
C. Angiotensin-converting enzyme inhibitors
D. Beta-blockers
E. Atypical antipsychotics

The answer is A. In population surveys of noninstitutionalized elderly adults,

up to 10% had at least one adverse drug reaction in the prior year. Adverse drug reactions
are common in elderly adults and are related to altered drug sensitivity, impaired renal or
hepatic clearance, impaired homeostatic mechanisms, and drug interactions. Long halflife
benzodiazepines are linked to the increased occurrence of hip fractures in elderly
adults. The association may be caused by the increased risk of falling (related to sedation)
in a population with a high prevalence of osteoporosis. This association may also be true
for other drugs with sedative properties such as opioids or antipsychotics. Exaggerated
responses to cardiovascular drugs such as angiotensin-converting enzyme inhibitors may
occur because of a blunted vasoconstrictor or chronotropic response to reduced blood
pressure. Conversely, elderly patients often display decreased sensitivity to beta-blockers.