CT in the diagnosis of mesenteric stromal tumors

SUN Wei; SUN Ying-wei; WEN Feng; LU Zai-ming; GUO Qi-yong

Journal of China Clinic Medical Imaging ›› 2014, Vol. 25 ›› Issue (6) : 417-421.

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CT in the diagnosis of mesenteric stromal tumors

SUN Wei1, SUN Ying-wei2, WEN Feng1, LU Zai-ming1, GUO Qi-yong1

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Abstract

Objective: To discuss the CT appearance of mesenteric stromal tumors. Methods: Imaging findings of 13 patients with histopathologically proven mesenteric stromal tumors were analyzed retrospectively. Results: The lesions located in the mesostenium (n=7) and mesocolon(n=6). The shape was lobulated in 6 cases, irregular in 3 cases and round or oval in 4 cases. The mean maximal diameter of 13 lesions was (10.5±4.9) cm, ranged from 2.5 cm to 18.4 cm. Five lesions were homogeneous solid mass, 8 lesions were heterogeneous with necrosis inside, including 2 lesions with air-fluid level. After administration of contrast medium, there was moderately or markedly homogeneous or heterogeneous enhancement in the lesions, but no enhancement was found in necrosis and air within the lesions. The lesions were divided into 2 types according to the pattern of enhancement of the solid component. Type Ⅰ, decrease enhancement in venous phase(n=8): there was homogeneously or heterogeneously mild to marked enhancement in arterial phase, with thickening and increasing of tumor vessels, then the degree of enhancement was decreasing in venous phase; Type Ⅱ, increase enhancement in venous phase(n=5): there was homogeneously or heterogeneously mild to marked enhancement in the arterial phase. The degree of enhancement increased gradually in venous phase, higher than arterial phase, appeared as progressive enhancement. There was local mesenteric lymphadenectasis in 3 cases. Conclusion: CT findings of stromal tumors in the mesentery have some characteristics, and important value in correct diagnosis and differential diagnosis.

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Intestinal neoplasms / Mesentery / Tomography / X-ray computed

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SUN Wei;SUN Ying-wei;WEN Feng;LU Zai-ming;GUO Qi-yong. CT in the diagnosis of mesenteric stromal tumors[J]. Journal of China Clinic Medical Imaging. 2014, 25(6): 417-421