Spot Diagnosis

What is the Diagnosis Based on This Head CT ?

A 73-year-old woman presented to the dermatology clinic with an 11-month history of an evolving pruritic, erythematous rash on her thighs and buttocks. On physical examination she was noted to have polycyclic erythematous plaques.

An 83-year-old healthy woman was admitted with episodes of nausea and vertigo that had increased in frequency over several months. Many of the episodes involved brief periods of unresponsiveness and staring spells.

A 69-year-old man presented to the dermatology clinic with a 2-month history of a pruritic rash. The rash first appeared on his right wrist and within 2 weeks had spread to his arms, legs, and trunk. His medical history was notable for chronic hepatitis C virus (HCV) infection.

A 31-year-old man presented to the emergency department with a 2-week history of left ear swelling. He had similar episodes over the past 2 years, and a 6-month history of weight loss, fatigue, and generalized aches.

A 66-year-old man presented to the emergency department with a 3-day history of cough, congestion, and pain in his chest and on the left side of his abdomen. What is the abnormality noted incidentally on chest radiograph and computed tomography of the abdomen?

A 3-week-old male newborn was brought to the pediatrician with three large scalp lesions, which had appeared in the first week of life. What is the diagnosis?

A 3-year-old boy presented to the pediatric urology clinic with a 6-month history of gross hematuria and intermittent abdominal pain. Urinalysis revealed red cells, white cells, and 3+ protein. What's the Diagnosis ?

An 81-year-old man with hypertension presented with pain and swelling of the left thigh and lower leg that had developed during the previous several hours. What is the diagnosis?

A 51-year-old male with diabetes presented with 2 weeks of general malaise and fever. What is the diagnosis?