• Suman Bikram Adhikari, Prabina Swornakar, Prabesh Paudel, and Asmita Neupane.
• Department of Pediatric Surgery, Grande International Hospital, Tokha, Kathmandu, Nepal.
• JNMA J Nepal Med Assoc. 2023 Feb 1; 61 (258): 171174171-174.

UnlabelledYolk sac tumour frequently arises in the gonads as a type of germ cell tumour, though rare is a highly malignant ovarian tumour in children and prompt treatment should be done. We hereby report a case of malignant ovarian tumour presenting with an abdominal lump and increased urinary frequency. Different diagnostic modalities were used such as ultrasonography of the whole abdomen, contrast-enhanced computed tomography abdomen pelvis and tumour markers of beta-human chorionic gonadotropin and alpha-fetoprotein. This revealed an 18.2x14.3x10 cm mass likely a neoplastic germ cell tumour with minimal ascites. A tumour mass was found to arise from the left ovary and complete excision of the tumour along the left fallopian tube was done. Adjuvant chemotherapy started immediately. We hereby present a case of a 9-year-old girl with a huge yolk sac tumour of the left ovary which is rare in our setting and is presented here to differentiate any ovarian mass in this age group.Keywordschildren; surgical procedure; yolk sac tumour.

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