PMC5835273_01
CT scan of the abdomen (coronal view) demonstrating a well-circumscribed cystic mass, with solid components (asterisk), occupying the entire right upper quadrant of the abdomen. The mass measures 19.0 x 19.7 x 13.8 cm in its maximal and displaces the right kidney (K) inferiorly and liver (L) anteromedially.
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fig1
Contrast-enhanced computerized tomography (CT) scans revealed a well-circumscribed cystic mass occupying the entire right upper quadrant of the abdomen (Figure 1).
CT scan of the abdomen (axial view) demonstrating the complex cystic mass that appears to arise from the retroperitoneum and displaces the left liver (L), pancreatic head (P), duodenum (D), and inferior vena cava (blue arrow) anteromedially. For orientation, the stomach (S) and aorta (red arrow) are labeled.
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fig2
The mass appeared to arise from the retroperitoneum and displaced the liver, pancreatic head, duodenum, and inferior vena cava anteromedially (Figure 2).
The excised cystic mass has been opened in longitudinal section. Thick yellow fluid has been evacuated from the cyst, leaving hair and sebum visible and small deposits of the bone and cartilage visible within the sac.
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On sectioning, the cyst contained thick yellow fluid, hair, and sebum (Figure 3).
Histologic sections at low power reveal ectodermal components of the skin, sebaceous glands ( ), and smooth muscle ( ) within the cyst wall. Mature adipocytes are present elsewhere in the photomicrograph. *Cross section through the smooth muscle.
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fig4
Histologic sections revealed ectodermal components of skin and hair adnexal structures within the cyst wall (Figure 4).