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An 11-year-old boy had generalized abdominal pain followed by nausea and vomiting. He had neither diarrhea nor fever. Examination revealed a flat, diffusely tender abdomen with no palpable masses. Pigmented macules were seen on his lips and buccal mucosa. A partial bowel resection had been performed 5 years ago because of intussusception.

A 55-year-old-man complained of joint stiffness and red, mildly tender plaques on his fingers. He had recently sustained a trauma to the hand while at his job as a fish handler. The condition was diagnosed as erysipeloid-a skin infection caused by the gram-positive bacillus Erysipelothrix rhusiopathiae.

Except for a fever of 1 month's duration, a 28-year man had no other complaints. He said he used to smoke marijuana but never used intravenous drugs. His temperature was 39.4°C (103°F), but no other abnormalities were noted on physical examination.

After 6 weeks of persistent low back pain, an overweight 72-year-old woman sought medical evaluation. There was no history of trauma.

Two days of pain in his right leg, which had been swollen for a week, brought this 69-year-old man with type II diabetes to the emergency department (ED). Three months earlier, the patient had undergone a radical retropubic prostatectomy with bilateral pelvic lymph node dissection. Examination in the ED revealed an edematous right leg indurated with a leathery-appearing thigh that was hot to the touch. His temperature was 38.7°C (101.7°F), and his white blood cell count was 21,290/µL with a shift to the left.

A minute, nonpigmented, innocuous-appearing papule on the nose of a 60-year-old man did not seem cause for alarm. However, a simple, 3-mm punch biopsy saved this patient's life.

Periorbital, forehead, and nasal erythema, crusting, and pain typical of herpes zoster affected a 90-year-old woman. Reactivation of the latent varicella zoster is more common in the elderly and is attributed to impaired immunologic mechanisms.

A 49-year-old woman, severely obese but otherwise healthy, appeared for a preemployment medical examination. She neither smoked cigarettes nor drank alcohol. She had no respiratory problems and recalled no family history of such. A baseline mammogram taken 4 years earlier showed no abnormalities, and the patient was not under care for any medical condition. Results of physical examination were normal, except for the obesity-which made it difficult to determine breast masses with confidence.

For 7 days, a 10-year-old boy had had a headache and a fever (temperature, 38.8°C [102°F]); a viral upper respiratory tract infection had been diagnosed. His parents brought him to the emergency department when weakness in his right leg developed, which impaired walking.

A 6-year-old girl was evaluated in the emergency department for a leg rash that had spread to the buttocks. The lesions first appeared earlier in the day and worsened hourly. The child's mother reported that her daughter was in good health until a low-grade fever, nonproductive cough, sore throat, and headache developed 5 days earlier. The youngster also complained of neck pain with movement.

The 83-year-old woman whose hands are shown in photograph A had a severe flare of arthritis in the metacarpophalangeal and proximal interphalangeal (PIP) joints after corticosteroid therapy for her asthma was stopped. The clue to the diagnosis of psoriatic arthritis is in her fingernails, which show both pitting and onycholysis.

A 44-year-old woman had a painful, burning rash for 4 months. The erythematous eruption was evident on the thighs, fingers, buttocks, abdomen, and perineal and intergluteal areas. Application of triamcinolone cream and emollients offered no relief.

A 27-year-old woman became extremely concerned when she was unable to pass the vision test required to obtain a driver's license. The patient had Marfan syndrome and “dislocated lenses.” She was otherwise healthy and had no cardiac abnormalities.

A 6-year-old girl presented with a huge ulcer on her right heel, seen here, that began as a minor laceration when she stepped on a rock several months earlier. On the left heel, there was a similar lesion in the process of healing that had also followed a minor injury. Her feet and hands were dry and hyperkeratotic.

The parents of a 6-year-old boy with a generalized rash sought medical care for the child. The outbreak began 2 years earlier on the boy's abdomen and spread over the entire body; oral antihistamines had been prescribed for the itching. The patient had no history of allergy, insect bite, fever, or GI symptoms. His vital signs were normal.

For the past 2 hours, a 19-year-old man had lower abdominal pain accompanied by nausea and vomiting. He had no fever and no diarrhea. Direct tenderness was mainly in the right lower quadrant, radiating slightly to the left lower quadrant. There was no significant rebound tenderness. The patient refused rectal examination.

Pingueculae-yellow lipid deposits-may develop on the bulbar conjunctiva after several years of exposure to drying, dust, and the UV rays of sunlight. They represent elastotic degeneration of the substantia propria and are not seen in infants or children. These lesions usually are evident on the nasal aspect of the conjunctiva; they are innocuous and require no treatment.

Many disorders that scar the skin also affect the scalp. Systemic lupus erythematosus, when associated with high fever and extensive systemic involvement, can cause a diffuse anagen effluvium. Hair loss caused by localized discoid lupus erythematosus (DLE) is more common. DLE may affect the scalp, where it is seen as circumscribed areas of often irreversible hair loss.