PMC8081829_01
Coronal section of CT scan from Case 2 demonstrates superior limit of cystic component (dotted line) which is compressing duodenum causing gastric outlet obstruction (solid arrows). The tumor contains fat (F) and areas of calcification (C), and encases superior mesenteric artery branches to the transverse colon (dotted arrow).
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F2
Abdominal and pelvic CT scan delineated a 11.4 cm x 8.0 cm x 7.7 cm, mixed solid and cystic retroperitoneal mass obstructing the gastric outlet with areas of calcification and fat, consistent with a mature teratoma (Figure 2).
PMC8081829_02
MRI images from Case 3: (A) Coronal section at level of iliofemoral vessels shows large, laterally encapsulated retroperitoneal tumor; (B) Coronal section posterior to (A) shows deformation of abdominal aorta (solid arrows) by tumor, and infiltration of left renal hilum (LRH) causing hydronephrosis.
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F3
Abdominal MRI demonstrated a 11.3 cm x 10.5 cm x 8.1 cm, mixed solid-cystic, encapsulated retroperitoneal mass (Figure 3).
Timelines for cases 1-3 summarizing treatment, recurrences and final outcome.
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F4