Mature Cystic Teratoma of the Right Adrenal Gland in a Pediatric Patient: A Case Report.

Adrenal teratomas are rare neoplasms, most often benign but with potential for malignant transformation, particularly in the pediatric population. A seven-year-old girl from kawasoti, Nepal, presented with intermittent right-sided abdominal pain for 2 months, initially attributed to dietary factors such as junk food intake. Ultrasonography revealed a large right suprarenal mass measuring 10.4 × 8.2 cm with internal calcifications. Contrast-enhanced computed tomography demonstrated a heterogeneous lobulated lesion containing fat, fluid, and calcifications in the right suprarenal region, displacing adjacent structures. The mass was surgically excised via exploratory laparotomy with complete excision of the right-sided retroperitoneal adrenal mass. Intraoperative findings revealed an 11 × 8 cm firm, encapsulated mass with dense adhesions to the inferior vena cava. Histopathological examination confirmed the diagnosis of mature cystic teratoma. The patient's postoperative course was complicated by wound dehiscence requiring secondary suturing, with subsequent development of a hypertrophic scar managed with intralesional triamcinolone injection. At six-month follow-up, the patient remained asymptomatic with no evidence of recurrence. This case highlights the diagnostic challenges of adrenal teratomas in children and emphasizes the importance of considering this rare entity in the differential diagnosis of suprarenal masses. Complete surgical excision remains the definitive treatment with excellent prognosis when the tumor is benign.