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DAILY FREE MCQ CHALLENGE for Medical PG Preparation
Ring sign is seen on the urography. Which among the following is the diagnosis of the patient?
A. Polycystic kidney
B. Renal cell carcinoma
D. Papillary necrosis
TIPSImportant Question from MCI
Answer : D.Papillary necrosis
Papillary necrosis can be caused by analgesic nephropathy, diabetes mellitus, alcoholism, and sickle-cell anemia. There is damage of the renal papilla, with resultant necrosis, cavitation, and calcium deposition. Calcium deposition can occur in a non sloughed necrotic papilla, in a completely detached papilla which remain in the calyx or at the periphery of a necrotic sloughed papilla. Unenhanced CT reveals a triangular or ring-shaped calcification in the sloughed papilla.
Reference : Genitourinary System. In: Elsayes KM, Oldham SA. eds. Introduction to Diagnostic Radiology. Reference link
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