Recurrence of immature ovarian teratoma as malignant follicular carcinoma with liver and peritoneal metastasis 22 years after completion of initial treatment.

Growing tumour syndrome (GTS) is a rare event in which germ cell tumours treated with chemotherapy undergo maturation, acquire resistance to chemotherapy and regrow. The optimum treatment strategy is complete surgical excision. We report on a case of GTS with malignant metastases to the liver presenting 22 years after completion of treatment for immature teratoma, successfully managed with surgical resection alone. © BMJ Publishing Group Ltd (unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.