Subepithelial Pelvic Hematoma (Antopol–Goldman Lesion) Simulating Renal Neoplasm: Report of a Case and Review of the Literature

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Abstract

The Antopol-Goldman lesion is a subepithelial pelvic hematoma simulating a renal neoplasm. We report the clinico-pathological features of a single case and a review of the literature. A 76-year-old man presented with flank pain and hematuria. Computed tomography showed a hypodense lesion of 6 cm at the left kidney with filling defect at pyelogram. The patient underwent nephroureter-ectomy for suspected neoplasm. Macroscopically, a mass of 6 cm was present impinging on the pelvi-caliceal system. Microscopically, the lesion was composed by hemor-ragic material with feature of an hematoma. A diffuse eosinophilic amorphous material suspicious for amyloid was observed among intra- and extraparenchymal vessels. The Congo-Red staining verified the presence of amyloid. The diagnosis was subepithelial pelvic hematoma with severe amyloidosis. Antopol-Goldman lesion should be kept in mind as a possible differential diagnosis of upper urinary tract lesion to avoid unnecessary nephrectomies. The anamnestic knowledge of amiloydosis may increase this diagnostic hypothesis.

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