The Classification Diagnosis of CT and its Imaging Features in Infantile Hepatic Hemangioendothelioma

Objective: to summarize the image features of Infantile Hepatic Hemangioendothelioma(IHH) base on Computed Tomography, in order to improve the diagnostic capacity. Methods: 11 cases of IHH which were confirmed by pathological examination were recruited to explore their CT features, All patients had undergone enhanced scan, and 6 received delayed scan. Results: 11 cases of IHH included massive type(6),(diameter, 5-10 cm); nodular type(3),(diameter,＜ 5 cm); diffuse type(2). In plain scan, all the cases show round low-density focus, massive type appear to be uneven density, with multiple calcifications, lower-density focus shows in central region in 4 cases, hemorrhagic focus shows in central region in 1 case. Nodular type appear to be uneven density, and calcifications is found in 1 case; diffuse type appear to be uniform density; massive type are lobulated, with clear border or unclear border; nodular type and diffuse type are lobeless, nodular type have unclear border, and diffuse type have clear border; in enhanced scan arterial phase, floral pattern of contrast enhancement are seen in massive type(5), nodular type(3), diffuse type(1), nodular of contrast enhancement is seen in massive type(1), Peripheral of contrast enhancement is seen in diffuse type(1), centripetal cord-like contrast enhancement were seen in massive type(3) and nodular type(1), the tumor enhancement was isodense relative to the abdominal aorta; all cases showed progressive enhancement in the portal venous phase and delayed phase, 4 cases of massive type show no enhancement in central region, enhancement of the entire tumor are found in all cases of nodular type and diffuse type. Conclusions: CT appearance of IHH mainly presented as centrality enhancement and delayed enhancement, but different kinds of which is characteristic.