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A 59-year-old woman presents to the Emergency Department complaining of severely painful skin lesions in the abdomen and thighs. Her medical history is significant for hypertension, hyperlipidemia, and end-stage renal disease. She has an arteriovenous fistula and undergoes hemodialysis 3 times weekly. She denies any recent medication changes or any illicit drug abuse, and denies ever taking warfarin. She is afebrile with a blood pressure of 162/96 mmHg and a heart rate of 96 beats per minute. On physical examination, there are areas of livedo reticularis over the abdomen with subcutaneous nodules and several necrotic ulcerations with eschar on both thighs. Her distal pulses are 2+ in all four extremities.   A review of her laboratory records over the past few months shows an uptrending calcium-phosphate product. Which of the following is the most likely diagnosis?     Ask StudybuddyGroup of answer choicesNecrotizing fasciitisDeep venous thrombosisCalcific uremic arteriolopathyHenoch–Schönlein purpuraNephrogenic systemic fibrosis

Question

A 59-year-old woman presents to the Emergency Department complaining of severely painful skin lesions in the abdomen and thighs. Her medical history is significant for hypertension, hyperlipidemia, and end-stage renal disease. She has an arteriovenous fistula and undergoes hemodialysis 3 times weekly. She denies any recent medication changes or any illicit drug abuse, and denies ever taking warfarin. She is afebrile with a blood pressure of 162/96 mmHg and a heart rate of 96 beats per minute. On physical examination, there are areas of livedo reticularis over the abdomen with subcutaneous nodules and several necrotic ulcerations with eschar on both thighs. Her distal pulses are 2+ in all four extremities.   A review of her laboratory records over the past few months shows an uptrending calcium-phosphate product. Which of the following is the most likely diagnosis?     Ask StudybuddyGroup of answer choicesNecrotizing fasciitisDeep venous thrombosisCalcific uremic arteriolopathyHenoch–Schönlein purpuraNephrogenic systemic fibrosis

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Solution

The most likely diagnosis for this patient is Calcific Uremic Arteriolopathy (CUA), also known as calciphylaxis. This is a rare, but serious, condition commonly seen in patients with end-stage renal disease. It is characterized by calcification of the small and medium-sized blood vessels in the dermis and subcutaneous fat, leading to ischemia and painful skin lesions. The lesions often appear as livedo reticularis with subcutaneous nodules and can progress to necrotic ulcerations, as seen in this patient. An uptrending calcium-phosphate product in a patient undergoing hemodialysis is a risk factor for CUA. The other conditions listed do not fit the clinical picture as well as CUA does.

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