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Histopathology. 1997 Jul;31(1):67-74.

Diagnostic value of inhibin immunoreactivity in ovarian gonadal stromal tumours and their histological mimics.

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1
Department of Pathology, Glasgow Royal Infirmary, Scotland.

Abstract

AIMS:

Inhibin is a heterodimeric protein hormone which appears to be a sensitive serological and immunohistochemical marker of ovarian granulosa cell tumours. The purposes of this study were to examine inhibin immunoreactivity in a wide range of gonadal stromal neoplasms and to assess its value in the differential diagnosis of problematic ovarian tumours.

METHODS AND RESULTS:

Inhibin immunostaining was identified in eight cases of stromal hyperthecosis, 24 adult-type granulosa cell tumours, two juvenile granulosa cell tumours, nine Sertoli cell or Sertoli-Leydig cell tumours, one gynandroblastoma, three gonadoblastomas, two cases of sex cord tumour with annular tubules, two steroid cell tumours and two sclerosing stromal tumours. Inhibin was also present in 4/6 fibrothecomas and 2/3 unclassified gonadal stromal tumours. There was no staining of neoplastic cells in any of the problematic ovarian tumours, in many of which a diagnosis of gonadal stromal tumour had been initially considered. However, inhibin was detected in reactive stromal cells in many cases.

CONCLUSIONS:

Inhibin is a sensitive immunohistochemical marker of a wide range of gonadal stromal tumours and is of value in the differential diagnosis of ovarian neoplasia.

[Indexed for MEDLINE]

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