Ciliated hepatic foregut cyst
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At the time the article was created Maxime St-Amant had no recorded disclosures.View Maxime St-Amant's current disclosures
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Ciliated hepatic foregut cysts are a very rare type of hepatic cyst, with non-specific radiological features. They are usually benign, but rare cases of malignant degeneration (to squamous cell carcinoma) have also been reported.
They are more often seen in adults, although a few cases have been described in children (approximately ten cases) 5.
Histologically, they are similar to a bronchogenic cyst.
They are composed of four layers including a ciliated pseudostratified columnar epithelium, a smooth muscle layer, a subepithelial connective tissue layer and an external fibrous capsule 5.
They are usually solitary, non-enhancing, unilocular, smaller than 3 cm and subcapsular in location 2. They often involve the segment IV of the liver.
They have a variable density, which ranges from hypodense (cystic) to isodense, to hyperdense (soft tissue density) on NECT 3.
Fluid-fluid levels are often seen, and the signal on MRI depends on its content (more fluid or proteinaceous).
- T1: variable signal from hypo-, iso-, to hyperintense, depending on the content of the cyst
- T2: predominantly hyperintense
- T1 C+: non-enhancing
Imaging differential considerations include: