Primary Mesenteric Liposarcoma Successfully Diagnosed by Preoperative Imaging Studies

Abstract

Liposarcoma is one of the most common primary neoplasms in the retroperitoneum, whereas primary mesenteric liposarcomas are rare (1). We encountered a case of liposarcoma which arose from the mesentery of the jejunum that was diagnosed by imaging studies before surgical operation. (Fig. 3A) and fat suppressed T1-weighted images and high intensity on T2-weighted images (Fig. 3B). On contrast study, heterogenous enhancement was seen after the injection of Gd-DTPA (Fig. 3C) (Fig. 4)

Recurrent primary mesenteric liposarcoma

“…To our knowledge, only 24 cases of liposarcoma occurring in the mesentery have been published in world literature. 3 It is histologically defi ned as a tumor composed of lipoblasts.…”

Well-Differentiated Mesenteric Liposarcoma with Osseous Metaplasia: A Potential Diagnostic Dilemma for the Pathologist

“…Radiological investigations, including CT scans and magnetic resonance imaging, are helpful in assessing the size of the tumor, local extension of the tumor, and tissue characteristics of the tumor [10,11]. On CT scan, liposarcoma is reported to exhibit inhomogeneity, poor margination, CT numbers greater than patients' normal fat, and contrast enhancement.…”

“…On CT scan, liposarcoma is reported to exhibit inhomogeneity, poor margination, CT numbers greater than patients' normal fat, and contrast enhancement. The contrast enhancement depends on the histological grade of the tumor [11]. The radiologic appearance of well-differentiated liposarcoma, especially lipoma-like tumors, can be similar to that of normal fat [11].…”

Multiple liposarcoma of mesentery and mesocolon

“…Elle représente environ 16 à 18 % des tumeurs de tous les tissus mous [4,5]. Elle touche fréquemment les extrémités et le rétropéritoine.…”

“…Le liposarcome peu différencié est facilement diagnostiqué par l'IRM, cependant, la distinction entre lipome et liposarcome bien différencié constitue un dilemme fréquent en raison des similitudes radiologiques entre ces deux lésions, comme chez notre patient. Grâce aux valeurs de densité dans l'échelle de Hounsfield au scanner [4,13]. Certaines caractéristiques radiologiques permettent cependant de les différencier : la taille importante de la lésion, la présence de septa épais, de lésions nodulaires et/ou globuleuses, de zones non graisseuses ainsi que la diminution de la composition adipeuse de la lésion orientent fortement vers le liposarcome.…”