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Ebrahimian R, Tasa D. Giant Primary Mature Retroperitoneal Teratomain in Adult Male Patient . Avicenna J Clin Med 2015; 22 (2) :165-169
URL: http://sjh.umsha.ac.ir/article-1-48-en.html

Introduction: Teratomas are congenital tumors consisting of derivatives from the ectoderm, endoderm and mesoderm germ cell layers. A teratoma is considered to be a non-seminomatous germ cell tumor and is typically located in either the sacrococcygeal region or in the gonads. Giant retroperitoneal teratomas in adults are even rarer, with only a few cases previously described in the literature. 

Case report: A 35-year-old male patient with severe nausea and vomiting was taken to the emergency ward of Hamadan Be’sat Hospital. He had not been feeling well, and had suffering from abdominal pain for a month. A physical examination showed some concretion in the right side of his abdomen. A CT scan of his abdomen and pelvis with IV and oral contrast re-vealed that the concretion was formed by aggregates of solid, cystic, and calcareous compo-nents. It compressed stomach and caused the rotation of the stomach around its longitudinal axis. 

Conclusion: Following the diagnosis, we performed a laparotomy and respected a concretion with dimension 20X25X22cm. Interestingly, we found out all mature tissues within the con-cretion in the pathology examination of an adequate sample (such as trachea, bone, GI lu-men…).