A 22-year old man presented with progressive headache, painless unilateral vision loss, fever, and axillary lymphadenopathy. CT head and lumbar puncture were negative. RPR and Lyme titers were negative. Fundoscopic examination revealed the following:
What is this finding and the likely etiology in the context of the patient’s symptoms?
A 50-year old male presents with a chronic pruritic rash of his groin that failed to respond to topical antifungals and glucocorticoids. KOH stain was negative for fungal elements. Examination under Wood’s lamp revealed the following:
A 63-year old white woman with end-stage renal disease secondary to long-standing hypertension on unscheduled dialysis, atrial fibrillation on warfarin, and hyperlipidemia presents with a painful, ulcerated lesion with purpuric borders, surrounding retiform purpura, and central eschar. Biopsy demonstrated calcifications of small and mediam sized arteries with necrosis of the subcutaneous fat.