Fig. 2

Photographs of the surgically removed uterine tumor. a Three uterine masses separately located on the right-anterior (*) and right-posterior (†) serosa and within the fundal myometrium (‡) of 9.5 cm, 4.5 cm, and 6.5 cm in largest diameter, respectively. b Cut surfaces of the uterine tumor by lesion, which were heterogenously tan to yellow with focal hemorrhage (*), white with yellow plaques (†), and pale-gray with intratumoral mosaic demarcation (‡). c-e Cytohistologic variation by lesion. (c) Uniform cells having round to ovoid nuclei and scant cytoplasm proliferating with intercellular edema (hematoxylin and eosin [HE] stain, × 100). d Tumor cells arranged in trabecular cords admixed with abundant fibromyxoid matrix (HE, × 100). e Classic morphology of low-grade endometrial stromal tumor characterized by numerous whorls around small vessels (HE, × 100). f Tumor extension into the extrauterine vein positive for CD10 (the upper area), adjacent to nonmetastatic pelvic lymph nodes (immunohistochemical [IHC] stain; bar, 0.5 mm)