من أجل التجريب لزر التكبير والتصغير – QPreTest Medical

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A previously healthy, full-term, 2-month-old boy was brought to the dermatology clinic with a 2-week history of annular plaques with edematous borders and central crusting on the face, scalp, and trunk. Results of a complete blood count and comprehensive metabolic panel were normal. Examination of a skin-biopsy sample obtained from the baby’s right forehead showed vacuolar interface dermatitis and perivascular and periadnexal lymphocytic infiltrates. Which of the following is the most likely underlying cause of this baby’s findings?

Cutaneous Langerhans cell histiocytosis

Impetigo

Milia

Neonatal lupus erythematosus

Tinea corporis

None

A full-term baby boy was transferred to the neonatal intensive care unit (NICU) at 30 hours of age owing to abdominal distention and failure to pass meconium. Before the transfer, the baby had fed poorly and regurgitated colostrum. A nasogastric tube had drained yellow fluid. An abdominal radiograph had shown dilated loops of small intestine. At the NICU, a bedside abdominal ultrasonogram showed possible reversal of the superior mesenteric vessels, and an urgent laparotomy was performed. Considerable distention of the small bowel by thick meconium was identified. Which of the following is the most likely underlying cause of this patient’s symptoms?

Congenital chloride diarrhea

Cystic fibrosis

Hirschsprung’s disease

Hypothyroidism

Intestinal atresia

None

Share on A 40-year-old man in the intensive care unit (ICU) was noted to have red urine. Eight hours earlier, he had been found unconscious in a fume-filled car. Cardiopulmonary resuscitation had been initiated for asystole, which resulted in the return of spontaneous circulation. Endotracheal intubation was performed and he received treatment for inhalation of car fumes. Which of the following is the most likely cause of this patient’s red urine?

Hematuria

Hydroxocobalamin-induced discoloration

Myoglobinuria

Porphyria

Rifampin-induced discoloration

None

A 22-year-old man presented to the dermatology clinic with a 1-year history of a red, scaly rash on his face and body. On physical examination, widespread erythroderma with overlying erosions, scaling, and crusting was observed. The oral mucosa was spared. A skin biopsy from the back showed superficial acantholysis (the loss of adhesion between keratinocytes). Direct immunofluorescence of the biopsy specimen showed intercellular IgG antibodies against desmoglein-1 in the superficial layers of the epidermis. What is the most likely diagnosis?

Bullous pemphigoid

Dermatitis herpetiformis

IgA pemphigus

Pemphigus foliaceus

Pemphigus vulgaris

None

A previously healthy 2-year-old boy was brought to clinic with a 1-week history of itchy, red spots. Three days before the onset of the rash, the child had had an upper respiratory infection for which he had been given ibuprofen. On physical examination, tense vesicles and edematous pink plaques with central erosions and crust were seen on the patient’s legs, arms, and back. Dense clustering of skin lesions was observed in the axillae and inguinal folds. No mucosal involvement was noted. Histopathological analysis of a skin-biopsy sample obtained from the right lower back showed a subepidermal blister with robust neutrophilic infiltration. Direct immunofluorescence revealed a linear band of IgA along the dermoepidermal junction. What is the most likely diagnosis?

Acute febrile neutrophilic dermatosis

Dermatitis herpetiformis

Erythema multiforme

Henoch-Schonlein purpura

Linear IgA bullous dermatosis of childhood

None

Behcet’s disease

Bullous pemphigoid

Linear IgA bullous dermatosis

Pemphigus foliaceus

Pemphigus vulgaris

None

A 62-year-old man presented with a 5-day history of low back pain and a 1-day history of lethargy. Physical examination was notable for tenderness over the lumbar spine and a normal neurologic examination. Radiographs of the lumbar spine showed gas within L4. Computed tomography of the lumbar spine confirmed the presence of intramedullary gas within L4, and also showed that the gas extended into the surrounding soft tissue, epidural space, and psoas muscles. What is the most likely etiology of this skeletal finding?

Air embolism

Calcium oxalate crystal deposition

Emphysematous osteomyelitis

Iatrogenic

Osteonecrosis

None

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