Brown tumour in phalanx of the ring finger due to chronic kidney failure. A case report. / Tumor pardo en falange del dedo anular por insuficiencia renal crónica. Reporte de un caso.

Brown tumours are highly vascular lytic bone lesions found in primary and secondary hyperparathyroidism. The brown term is given due to the red-brown colour of the tissue, which is due to the accumulation of hemosiderin. The case is presented of a 29 year-old male with chronic renal failure, who had a mass in the tip of the ring finger after a trauma of 4 months onset, which had increased progressively in size and pain. He was treated surgically, by amputation, with no recurrence 10 months after the surgery.