ENO2 and cystic teratoma: On definitive histological report, according to World Health Organization WHO 2014 classification, the lesion was diagnosed as monoderm cystic teratoma of the ovary with an area of struma ovarii, including a focus of well‐differentiated NET (Syn+, CD56+, Neuron Specific Enolase (NSE)+, CDX2 focally +, CgA−, Thyroglobulin−, TTF1−).