[…] blood vessels Herringbone pattern may be seen Variable cell density, variable collagen Usually scanty mitoses May be infiltrative and entrap seminiferous tubules; this feature has no impact on tumor behavior Usually no Sertoli, granulosa, sex cord types present [pathologyoutlines.com]

They typically present in older women with over 80% showing in the postmenopausal period 2,5. Clinical manifestations of thecomas are similar to those of granulosa cell tumors, with uterine bleeding predominating (~60% of cases). [radiopaedia.org]

• Weakness

  […] lipid may give a chemical shift artifact 3 T1 C+ (Gd) the degree of contrast enhancement varies with the amount of fibrous tissue within the tumor while theca cells in the normal ovary are highly vascularized, the fibrous tissue is known for delayed weak [radiopaedia.org]

Treatment and prognosis Thecomas are almost always benign and have low malignant potential, although there have been isolated reports of malignant thecomas. fibroma low signal on T2 given the fibroid content less enhancement adult granulosa cell tumor [radiopaedia.org]

[…] uncommon Clinically benign with no reported recurrences or metastases Case reports Signet ring stromal tumor of the testis - extremely rare (Hum Pathol 2009;40:584) 2 cases with focal sex cord component (inhibin+, CD99+, Arch Pathol Lab Med 1999;123:391) Treatment [pathologyoutlines.com]

Treatment and prognosis Thecomas are almost always benign and have low malignant potential, although there have been isolated reports of malignant thecomas. fibroma low signal on T2 given the fibroid content less enhancement adult granulosa cell tumor [radiopaedia.org]

Testicular fibroma Testicular stromal tumor with myofilaments Theca cell tumor Thecoma-like Sertoli cell tumor Unclassified sex cord stromal tumor with a predominance of spindle cells Epidemiology Rare tumor Occurs in third or fourth decade of life Etiology [pathologyoutlines.com]

[…] with epithelial differentiation Stromal tumor resembling fibroma Testicular fibroma Testicular stromal tumor with myofilaments Theca cell tumor Thecoma-like Sertoli cell tumor Unclassified sex cord stromal tumor with a predominance of spindle cells Epidemiology [pathologyoutlines.com]