CT features of pneumonic-type pulmonary invasive mucinous adenocarcinoma / 中国医学影像技术

ABSTRACT

Objective: To observe CT features of pneumonic-type pulmonary invasive mucinous adenocarcinoma (PIMA). Methods: Clinical, imaging (plain and multi-phase enhanced CT) and pathological data of 30 patients with pathologically confirmed pneumonic-type PIMA were retrospectively analyzed. Results: Consolidation was found in all 30 cases, including 5 cases of pure consolidation and 25 cases of consolidation with multiple morphologies. The density of consolidation was lower than the same level muscles. Mild-to-moderate enhancement of consolidations were observed after administration of contrast media. CT angiogram sign and lobar distention sign were detected inside consolidations in 26 and 12 cases, respectively. Nine cases were diagnosed as lung cancer, while 21 cases were diagnosed as infection or other lesions with the first time CT examination. Conclusion: The consolidation of pneumonic-type PIMA has some characteristics, including low density, mild-to-moderate enhancement, angiogram sign and lobar distention sign. Consolidation combined with ground glass density, nodules and cystic transparent shadow are helpful to differential diagnosis of pneumonic-type PIMA, infectious lesions and infectious diseases or lymphoma.