Infectious Disease

A 15-year-old boy noticed that his tongue had become dark shortly after he recovered from an upper respiratory tract infection. The dusky, matted layer seen on its dorsal surface represents hypertrophied filiform papillae and lack of normal desquamation. The papillae mimic long hairs and may be stained black, brown, yellow, or whited from foods, medications, tobacco, or chromogenic bacterial overgrowth. Hence the term: black hairy tongue.

A 30-year-old man, who was homeless, was admitted to the hospital with a several-month history of dyspnea and fever. He complained of producing excessive sputum and having frequent bouts of hemoptysis. Bilateral crackles were heard during examination of the lungs. The patient was in acute respiratory distress and was intubated to provide ventilatory support.

A 70-year-old man first noticed this skin condition when he returned from the South Pacific at the end of World War II. Over the years, the rash has itched only occasionally; however, during a recent spate of hot weather, the eruption became highly pruritic. Applications of an over-the-counter 1% hydrocortisone ointment exacerbated the condition.

When this boy was born, he was covered by a transparent membrane resembling oiled parchment or collodion. The membrane was shed within 2 weeks and, subsequently, the infant was found to have normal skin. Lamellar ichthyosis usually develops in babies with this condition, although in some the skin clears completely.

A 40-year-old farmer had been complaining for 3 weeks of a tender, red, itchy, scaling plaque with papulopustules on one knee. A potassium hydroxide examination of the scale revealed fungal hyphae.

These pruritic but otherwise asymptomatic lesions on the right upper arm of a 77-year-old woman first appeared about 1 year before she sought medical consultation. The patient's history included frequent, generalized pruritus, which was believed to be secondary to long-standing type 1 diabetes mellitus.

A 34-year-old man experienced fever and arthralgia several days after appearance of the rash.

Three months ago, a 50-year-old man who was otherwise in good health noticed a hard, round nodule on his left arm. Within 2 months, similar nodules appeared all over his trunk, head, arms, and legs. The reddish purple lesions, less than 2 cm in diameter, were painless and slightly pruritic.

An 85-year-old white woman was brought to the emergency department (ED) with acute, severe left posterolateral chest wall pain of several hours' duration. The nonradiating pain was accompanied by shortness of breath. She denied palpitations, diaphoresis, syncope, or dizziness.

A 37-year-old man presented with a reddish nodule in the umbilical area that had been present since early infancy. The lesion had been cauterized with silver nitrate several times in the past but had not resolved. No drainage or secondary infection was noted, and the patient was otherwise in good health.

In the web space of his left hand, a 50-year-old barber had a painful cystlike lesion. The lesion had recurred intermittently, despite oral antibiotic treatment and warm compresses. The patient's father, also a barber, had a similar, more severe condition, which eventually required surgical intervention.

Several hours after he had installed ceramic tile, a 33-year-old man experienced muscle spasms and felt pressure in his right shoulder. He denied previous injury to the area.

Rapid swelling and redness of a 13-month-old child's right upper eyelid prompted his parents to seek medical care for the infant. The parents reported that the child was slightly more fussy than usual and had no history of trauma.

A 55-year-old woman with no significant medical history reported that diffuse erythematous, patchy, purpuric skin lesions over most of her body had been present for the past year. Applications of an over-the-counter corticosteroid cream helped control the pruritus but did not clear the skin lesions.

A previously healthy 52-year-old man had been using an antidandruff shampoo and a topical corticosteroid for a chronic scalp eruption that had been diagnosed as seborrheic dermatitis. Because the condition had not responded to this regimen, a scalp biopsy was performed; the findings were consistent with seborrheic dermatitis.

Persistent bloating, epigastric discomfort, and increased gastric acidity prompted a 47-year-old woman to seek medical care. Gastroesophageal reflux disease was diagnosed; antacids and H2-blockers were prescribed but provided no relief.

A 43-year-old man sought treatment of a “fungal nail infection” that had been present for several years. The condition had not responded to standard dosages of itraconazole, terbinafine, and fluconazole prescribed by another physician.

A pruritic lesion on the arm of a 26-year-old woman had grown to 22 cm while she was "treating" the eruption with a topical corticosteroid.

For the past few days, a 75-year-old man with a history of chronic obstructive pulmonary disease had suffered from dyspnea and fever (temperature, 38.3°C [101°F]). He also complained of producing excessive foul-smelling sputum but denied any hemoptysis.

A 60-year-old woman with a 3-month history of cough, chest pain, and shortness of breath was brought to the emergency department. The patient denied any history of fever, chills, or rigors; she complained of mild hemoptysis for 1 week and a 9-kg (20-lb) weight loss during the last few months. The patient had smoked cigarettes for 40 years.

These notched upper central incisors were noted in a 3-year-old girl. There was no history of traumatic injury to her mouth. The youngster was able to sweat normally, and no other evidence of ectodermal dysplasia was present.

A 1 × 0.5-cm hemorrhagic, polypoid lesion that had been present for 2 months on a 13-year-old boy's left anterior chest was excised. Pathologic examination confirmed the diagnosis of pyogenic granuloma.

A patient arrives at your office complaining of severe pain associated with small lesions in his mouth. He tells you that similar painful sores had erupted in the past, but they healed and disappeared.

This is a common infectious problem, especially among school-age children. In many cases, there are well-defined areas of hair loss that can mimic alopecia areata.

A roentgenogram of the kidneys, ureter, and bladder of a 58-year-old man shows bilateral stones in the renal pelvis and the renal calyces. The patient had a history of recurrent urinary tract infections caused by Proteus mirabilis. A ureteral catheter (pigtail) had been placed in the pelvis of the left kidney to facilitate drainage.

A scaling, red, fissured area between digits 4 and 5 on her right hand sent a 33-year-old woman to her physician. Diagnosis of interdigital Candida was confirmed by a potassium hydroxide evaluation of material from the site.

A week after the onset of headache, fever, chills, nausea, weakness, and malaise, a 23-year-old man presented to the emergency department of a hospital on Long Island in New York. He reported that analgesics had not eased his symptoms. The patient's only past hospitalization was a splenectomy secondary to an auto accident at age 16.

A 40-year-old woman with AIDS had been feverish for the past 24 hours and had a nonproductive cough. She had smoked one pack of cigarettes daily for 20 years.

Four days after having been given cefuroxime for sinusitis, a 49-year-old woman experienced abdominal cramping, diarrhea, fever (temperature of 39.4°C [103°F]), and nausea. These problems persisted for 1 week, at which time the patient arrived at the emergency department. She had no recent history of travel, ingestion of undercooked food, or exposure to anyone with similar digestive problems.

Erythromycin had been prescribed for a 15-year-old boy who complained of flulike symptoms. Twenty-four hours after starting the medication, he awakened with painful ulceration of his mouth and lips. The erythromycin was discontinued, and hydroxyzine (25 mg, three times daily) was started for possible macrolide sensitivity. His condition worsened over the next 3 days, however, and he was hospitalized when the severe oral pain made it impossible for him to tolerate food or drink. At no point had he any nausea, vomiting, diarrhea, fever, or chills.