[Left cystic mature adrenal teratoma: a case report].

Adrenal teratoma is a rare germline tumor with a malignant potential. We present a case of left adrenal teratoma complicated by diabetes. The 64-year-old female patient showed multiple cystic space-occupying masses in the left kidney in B-mode ultrasound examination, and plain and enhanced CT reported a 9.0 cm heterogeneous mass in the left adrenal gland. After effective control of blood glucose, the mass was surgically removed and sent for pathological examination. The mass consisted of multiple cysts containing lipid-like substance with a cyst wall thickness of 0.2-0.4 cm; bony structures were found on the sections of the mass with fat tissues on the mass surface. A final diagnosis of left cystic mature adrenal teratoma was made based on the clinical and pathological findings and literature review. The patient was followed up for 6 months and no local recurrence or metastasis was found. Mature adrenal teratoma can be easily diagnosed by ultrasound and CT examinations and should be distinguished from other tumors of an adrenal source. Early diagnosis and early surgical resection is key to the treatment, and a definite diagnosis can be made pathologically. Chemotherapy is necessary in inoperable cases or for such tumors with a malignant potential. The patients should be followed up for life time after the treatment.