We report the sonographic findings in a case of fibrous pseudotumor of the tunica vaginalis. Scrotal gray-scale sonography revealed a well-margined, hypoechoic mass with an onion ring appearance and central calcifications in the left scrotum. Color Doppler sonography showed no blood flow within the mass. The pathological examination revealed a fibrous pseudotumor with a paucicellular and fibroblastic proliferation of cells within a hyalinized collagenous stroma.
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