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Open Access Case Report

Adult type granulosa cell tumor of the testis with a heterologous sarcomatous component: case report and review of the literature

Thomas EO Schubert1, Robert Stoehr2, Arndt Hartmann2, Sabrina Schöne3, Mathias Löbelenz3 and Gregor Mikuz4*

Author Affiliations

1 Institute of Applied Pathology, Speyer, Germany

2 Department of Pathology, Friedrich Alexander University, Erlangen, Germany

3 Department of Urology, Hetzelstift, Neustadt/Weinstrasse, Germany

4 Institute of Pathology, Medical University Innsbruck, Muellerstrasse 44, A-6020 Innsbruck, Austria

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Diagnostic Pathology 2014, 9:107  doi:10.1186/1746-1596-9-107

Published: 3 June 2014

Abstract

Adult testicular granulosa cell tumors are rare sex cord- stromal tumors of which only 45 have been previously reported. As compared with their ovarian counterparts, these tumors may follow a more aggressive course because the proportion of malignant cases is higher. We report here a unique case of a 78-year Caucasian with a left sided adult type granulosa cell tumor with a heterologous sarcomatous tumor component. A heterologous sarcomatous component has occasionally been observed in ovarian tumors but never in testicular granulosa cell tumors. The sarcomatous component showed a higher number of mitotic figures (1/Hpf) and a marked proliferation rate (up to 50% Ki 67 positive cells) compared with the granulosa type tumor component. CD 99 and the progesterone receptor were positive in both tumor components, inhibin and calretinin only in the granulosa cells, and pancytokeratin only in the sarcomatouse one. Key words: testis - ovary - granulosa cells - sarcoma - inhibin Runing title: testicular sarcomatous granulosa tumor.

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