Liver teratoma in a 14-year-old female: a case report.

Teratomas are rare tumors composed of tissues from all three germ layers: ectoderm, mesoderm, and endoderm. While they are most commonly found in the gonads, they can also occur in extragonadal sites, including the liver-though this is extremely uncommon, accounting for < 1% of liver neoplasms. We report the case of a 14-year-old female who presented with right upper quadrant pain and nausea and was initially diagnosed with a hydatid cyst. However, surgical resection and histopathological analysis revealed a mature cystic teratoma of the liver. This case highlights the importance of considering teratomas in the differential diagnosis of liver masses, particularly when imaging findings are atypical. Surgical excision remains the treatment of choice, and histology plays a crucial role in confirming the diagnosis and guiding further management.