extragonadal teratoma https://www.malacards.org/card/extragonadal_teratoma Extragonadal teratoma is an extremely rare, benign or malignant germ cell tumor characterized, clinically, by a teratoma presenting in an extragonadal location (e.g. retroperitoneum, mediastinum, craniofacial or sacrococcygeal region, intraosseous, solid organs) and, histologically, by displaying well-differentiated structures, as well as immature elements. Presenting symptoms are variable depending on size and location of tumor. MONDO:0019500 GARD:0018711 UMLS:C4708601 NCIT:C189045 MedDRA:10043276 Orphanet:883 SCTID:768937006 MEDGEN:1646497 extragonadal non-dysgerminomatous germ cell tumor