Myxoma of the renal capsule.

摘要: Myxomas are uncommon soft-tissue neoplasms, which extremely rare in the kidney, with only five cases documented intraparenchymal location. However, renal capsular myxoma has not yet been reported. We describe a unique case of clinically detected arising capsule. A 37-year-old man receiving treatment for epididymitis sought medical assistance infertility. radiological examination incidentally discovered right tumor. The mass intruded into perirenal tissue and measured 6 cm major diameter. resected kidney contained well-circumscribed gelatinous It was composed sparse, bland, slender, spindle-shaped cells scattered large amounts basophilic interstitial mucoid material. tumor showed diffuse immunoreactivity vimentin. Occasional stained alpha-smooth muscle actin calponin. Reactivity negative S100 protein, epithelial membrane antigen, pancytokeratin, neurofilament h-caldesmon antibodies. Ultrastructural revealed fibroblast-like long thin cytoplasmic processes, prominent rough endoplasmic reticulum, well-developed Golgi complex, secretory vesicles. No basal lamina identified around cells. differential diagnosis includes many other benign malignant lesions exhibiting secondary myxoid features. is important to consider when examining at this anatomic site avoid misdiagnoses ensure that patient receives appropriate prognostic information.