Fig. 1: Morphologic spectrum of sex cord-stromal tumors not amenable to specific histologic classification.

A Malignant sex cord-stromal tumor with monophasic epithelioid morphology (case 12). B Sex cord-stromal tumor with monophasic spindle cell morphology (case 8). C Biphasic sex cord-stromal tumor with epithelioid (right) and spindle cells (case 5). D Biphasic sex cord-stromal tumor (case 3) with epithelioid and spindle cells (inset). Both components of this lesion demonstrated diffuse nuclear beta-catenin expression (not shown).