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Adrenal mature TMT is very rare. So far, only two cases have been reported.We report a rare case of malignant transformation of a mature teratoma in the right adrenal gland of a 36-year-old Chinese female. The patient had been asymptomatic until physical exam identified a palpable mass in the right abdomen. Abdominal non-enhanced computed tomography (CT) scan showed a huge tumor with mixed density in right adrenal region, which had cystic components, fat, calcifications, and separations. Contrast-enhanced CT showed significant enhancement of the cyst wall and septations as well as mural nodules. In addition, the patient had four abnormal laboratory results, including cortisol 773.58 mol/L ↑ (reference range 118.6 to 618 mol/L), adrenocorticotropic hormone (ACTH) 70.980 pg/ml ↑ (reference range 7.2 to 63.3 pg/ml), aldosterone 317.84 pg/ml ↑ (reference range prone: 49.3-175 pg/ml; Standing: 34.7-275 pg/ml; 24h urine 2.84-33.99 ug/d), and vanillyl mandelic acid (VMA) 22.38 mg / 24 h ↑ (reference range 0-13.6 mg / 24 h) which to our knowledge have not been reported by any adrenal mature teratoma's reference literature.It was initially diagnosed as a right adrenal hamartoma by the radiologist. Final pathology confirmed it as malignant transformation of a right adrenal mature teratoma, which is extremely rare.Laparoscopic resection is usually the treatment of choice for adrenal teratoma and our case report is no exception.This article is a case report, no outcomes.Non-enhanced CT findings of a mass with cystic change, fat, calcification and separation are suggestive of a teratoma. If there is significant enhancement of the cyst wall and septations as well as mural nodules in contrast-enhanced CT, then adrenal TMT should be considered. In addition, abnormal levels of hormones including cortisol, ACTH, aldosterone and VMA may also aid in the diagnosis of adrenal TMT.

Malignant transformation of a mature teratoma of the adrenal gland