Lipomatous tumors of soft tissue: MR appearance with histological correlation

Soft tissue sarcomas at a glance: clinical, histological, and MR imaging features of malignant extremity soft tissue tumors

“…The nonlipomatous component has low signal intensity (SI) on T1-weighted images (T1WI) and various SIs on T2WI, depending on the type of tissue present. The thick septa or nodules enhance markedly after contrast administration [7][8][9]. Differentiation between welldifferentiated and dedifferentiated liposarcoma by using MR imaging is difficult.…”

“…The foci represent small quantities of fat within the tumor, usually no more than 10% of the total volume [10]. Tumors have a high SI on T2WI, due to the myxoid matrix, and most show heterogeneous enhancement with nonenhancing areas of mucinous material and enhancing areas with high vascularity and cellularity [7][8][9]11]. Some present as cystic masses with sharply demarcated margins, which can lead to misdiagnosis as a benign cyst.…”

“…On MRI pleomorphic liposarcomas are difficult to differentiate from other aggressive sarcomas because they present as heterogeneous masses (low on T1WI, high on T2WI, with heterogeneous enhancement) and because they contain little or no fat. They usually show well-circumscribed margins [7][8][9] (Fig. 1).…”

Sıradışı Yerleşimli Dev Lipoma: Olgu Sunumu

“…Also, density of the mass may help to differentiate a malign tumour from a benign one. However, degeneration, bleeding or necrosis may confuse the clinician (9). Magnetic resonance imaging is a popular imaging modality to identify tumour location and possible infiltration of the neighbour tissues.…”

A rare case of benign fat tumor: Hibernoma

“…Microscopically it is characterized by multi vacuolated cells with eccentric nuclei, uni-vacuolated cells with peripheral nuclei, and smaller round cells. 6,7 The treatment consists of complete surgical resection and the postoperative prognosis is excellent. 4 …”