Abstract
An ovarian tumor of mixed theocomatous and lipid cell structure is described and the clinical and pathological features of this and 11 previously reported cases are reviewed. Functionally the tumors resemble lipid cell tumors in being mainly androgenic and are similar in size range and age incidence to the adrenal type. Three tumors contained hilus (Leydig) cells with Reinke crystalloids. The tumors furnish additional evidence of the stromal origin of lipid cell tumors and the term lipid cell thecoma is proposed for them as indicating their main morphological affinities. Fibromas, fibrothecomas, thecomas, lipid cell thecomas and lipid cell tumors form a series of related stromatogenous tumors of relatively simple structure with functional correlations as one moves from left to right.

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