Pediatric Retroperitoneal Teratoma

Etiology: Germ cell tumor containing elements from all three embryological layers of endoderm and mesoderm and ectoderm
Imaging:
— Retroperitoneal in location
— Predominantly solid or cystic mass
— Can have calcifications and fat
DDX:
Complications: May undergo malignant transformation
Treatment: Surgical
Clinical:

Radiology Cases of Retroperitoneal Teratoma

US of retroperitoneal teratoma — AXR (left) shows faint calcifications in the middle aspect of the right abdomen. Transverse US (above right) and sagittal US (below right) of the right lower quadrant shows a large primarily cystic mass with some solid components that is medial to and inferior to the right kidney.

CT of retroperitoneal teratoma — Axial (above), coronal (below left), and sagittal (below right) CT with contrast of the abdomen shows a large left-sided abdominal mass which arises from the retroperitoneum and crosses the midline and which displaces the left kidney inferiorly and posteriorly. The mass is heterogenous in nature and contains fat, is predominantly solid but has some cystic components, and it enhances minimally.

Surgery Cases of Retroperitoneal Teratoma

Surgical image of retroperitoneal teratoma — Gross pathological image shows a large heterogenous mass that was cystic to palpation.

Gross Pathology Cases of Retroperitoneal Teratoma

Gross pathology image of retroperitoneal teratoma — Gross pathological image shows a large heterogenous mass that was cystic to palpation.