Infectious Disease

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An 18-month-old girl presents with a mass in the lateralupper right orbital area (lateral brow). The lesion can bepalpated beneath the eyelid just inside the lateral aspect ofthe orbital rim. The lesion does not appear to interferewith the girl’s vision. The extraocular movements all appearnormal and, grossly, the child appears to visualizenormally with her right eye. CT reveals a well-circumscribed,cystic mass without bony involvement or deep intracranialextension.

For 3 weeks, a 52-year-old woman has had right-sided, intermittent, dullabdominal pain and jaundice; these symptoms have worsened in the past fewdays. The pain radiates to the back, worsens with movement, is somewhatrelieved in certain positions, and is unrelated to eating or defecation. Duringthe past 3 weeks, she has also noticed darkening of her urine, a profound decreasein appetite, and an increase in fatigue; she has lost considerable weightbut is unsure of the exact amount. She has had no nausea, vomiting, or melenaor other change in her bowel movements.

The patient is a 4-year-old boy who hasbeen coughing persistently for the past 2months. The mother reports that aboutthe time the coughing began, the childhad a “cold” with nasal congestion andfever. These symptoms resolved, but acough ensued. The mother tried usingover-the-counter medications, includingcough suppressants, but the cough hasnot abated. It occurs during the day andat night. It is disrupting the child’s sleep,and the teachers at his day-care centerare concerned that he may be infectingother children.

A 24-year-old African American man presents for a routine eye examination. Theocular findings are unremarkable; however, well-circumscribed areas of whitenedskin are noted on his forehead and hands (A and B). The patient reportsthat the patchy loss of pigment has been progressing over a number of years.

Child abuse is common. Each year in thiscountry, nearly 3 million children are reportedto Child Protective Services. Approximately50% of reports are for neglect, 30% forphysical abuse, and 20% for sexual abuse.Retrospective studies suggest that 1 in 4 girls and 1 in 8boys are sexually abused before age 18.1

A 55-year-old woman has had a lump under her right jaw for thepast 24 hours. She has difficulty in swallowing because of neck discomfort, andher voice is raspy. Both of these symptoms have progressed rapidly during thepast 12 hours. The patient has no difficulty in breathing, sore throat, or historyof recent illness. Her temperature is 38.5°C (101.5°F).

An 11-year-old boy has had a persistent foot rash since he started to play baseball2 months earlier. The eruption has not responded to over-the-counter antifungalcreams.

A 64-year-old woman presentsto the emergency department withworsening crampy abdominal painthat began the night before. Afterthe pain started, she had a bowelmovement containing a significantamount of blood; since then she hashad episodes of diarrhea. She hadbeen previously healthy, denies traumaand fever, and knows no one withsimilar symptoms. She reports norecent enema, endoscopy, or otherabdominal procedure.

A 36-year-old womanhas had a rash on her hands and feetfor the past week. She denies recentillness, pruritus, fever, chills, sorethroat, and abdominal discomfort.She is currently in a monogamousrelationship with her fiancé.

A 54-year-old Hispanic housewife presents to the emergencydepartment with a 3-week history of moderatelysevere, progressive, generalized, pulsating headache.The headache, which is partially relieved by propoxyphenenapsylate, is associated with weakness, vomiting of recentonset, and intermittent bilateral blurred vision. The symptomsbegan after an incident in which the patient’s sonwas stabbed.

In recent years, 2 large randomized,controlled studies have documentedthe efficacy of the anticonvulsantgabapentin in the management ofpainful diabetic neuropathy (PDN)1and post-herpetic neuralgia (PHN).2Although vastly different in origin,these 2 neuropathies have exhibitedsome similarities in their response totherapeutic agents of various classes.The discovery that yet another typeof pharmaceutical is useful in treatingpain from either PDN or PHN hasraised questions about the similaritiesand differences in the managementof these 2 painful neuropathicsyndromes.

For 3 days, a 60-year-old woman hashad a tender rash on her forehead. Thelesions erupted 2 days after she sustainedminor trauma to the left side ofthe forehead (Figure 1); no scratchesor bleeding were associated with theinjury. She noted a burning sensationand mild tenderness at the site shortlybefore the lesions arose.

Prolonged exposure to coldtemperatures can have a profoundeffect on the skin.When tissues are exposed toabove-freezing temperatures,localized vasoconstriction and increasedblood viscosity reduce bloodflow and decrease the amount ofoxygen available to tissues. Whentissues are exposed to freezing temperatures,water within those tissueschanges into ice crystals; this resultsin either intracellular or extracellulardamage and tissue necrosis.

A 3-year-old boy is brought to the office by his mother. Theprevious evening, she had noticed a single large red spot on the back of histhigh. This morning, his whole body was covered with a similar rash, andhe had a temperature of 38.8°C (102°F). The mother administered 1 doseof acetaminophen at home for the fever; the rash was asymptomatic.

A 60-year-old woman reportsthat she has felt intermittent“fullness” in her face for the past day.This sensation is present when sheis supine on the examination table.She denies shortness of breath, dysphagia,and chest discomfort. Thepatient has a 25 pack-year history ofcigarette smoking.

A 67-year-old man with poorly controlled type 2 diabetes mellitus presents withleg pain and swelling that began 3 days earlier. Multiple ulcers are noted at thelateral malleolus. His temperature is 38.9°C (102.1°F). Right lower extremitycellulitis is diagnosed, blood samples are taken for culture, and the patient ishospitalized.

A 28-year-old woman complains that her acne has worsened since she startedtaking minocycline for the skin condition 6 weeks earlier. She also uses a norgestimate/ethinyl estradiol oral contraceptive, which has an indication for acnetreatment. Numerous small, pruritic, erythematous follicular papules are presenton the patient’s forehead, cheeks, and nose

A 29-year-old woman presents with a painful erosive dermatitis that has spreadin a perioral distribution during the last 2 days. She complains of a low-gradefever and swollen lymph nodes. The patient has a history of atopy; she isotherwise healthy and takes no medications.

During the past few weeks, a 14-year-old boy has noticed blood on the proximalnail folds of the second and third fingers of his dominant hand. He deniesany pain or pruritus. The patient is otherwise healthy and takes no prescriptionmedications.

An 82-year-old man suddenly became extremely short of breath while helpinghis wife wash dishes. The dyspnea was not accompanied by pain, and it was notrelieved by sitting. He was taken to the emergency department after diaphoresisand cyanosis developed.