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Table 1 Comparison of key histologic features to the mentioned differential diagnosis

From: Fibroma with minor sex cord elements – an incidental finding in a normal sized ovary A case report with literature review

Histologic features Fibroma with minor sex cord elements Ovarian Fibromatosis Brenner tumor Adenofibroma
Spindled cells in fascicles & whorls Present Present Present Present
Collagen Variable Abundant variable variable
Normal ovarian follicles Replaced by fibrous stroma Preserved absent absent
Small nests of undifferentiated sex cord type cells Present (<10% of tumor area) absent absent absent
Edema absent Present absent absent
Epithelial nests of transitional/mucinous cells absent absent Present absent