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Lipomas, Lipoma Variants, and Well-Differentiated Liposarcomas (Atypical Lipomas): Results of MRI Evaluations of 126 Consecutive Fatty Masses

¹ Both authors: Department of Radiology, Duke University Medical Center, Erwin Rd., DUMC #3808, Durham, NC 27710.

View larger version (138K): [in a new window]   Fig. 1. —62-year-old woman with simple lipoma. Axial T1-weighted image (TR/TE, 800/8) obtained through left hemipelvis shows large high-signal mass with few, thin, discrete septa (arrows) typical of simple lipoma.

View larger version (148K): [in a new window]   Fig. 2. —35-year-old woman with intramuscular lipoma. Sagittal T1-weighted image (TR/TE, 600/10) obtained through forearm shows infiltrating intramuscular lipoma containing multiple bands of muscle (arrows).

View larger version (158K): [in a new window]   Fig. 3A. —59-year-old woman with well-differentiated liposarcoma. Coronal T1-weighted image (TR/TE, 500/10) obtained through right thigh shows large high-signal mass containing multiple mildly thickened septa (arrows).

View larger version (187K): [in a new window]   Fig. 3B. —59-year-old woman with well-differentiated liposarcoma. Corresponding coronal T2-weighted image (4,050/102) with fat saturation shows multiple foci of high T2 signal (arrows) in mass.

View larger version (169K): [in a new window]   Fig. 4A. —59-year-old woman (different from patient in Fig. 3A, 3B) with well-differentiated liposarcoma. Axial unenhanced T1-weighted image (TR/TE, 550/8) obtained through left thigh shows predominantly high-signal mass with multiple ill-defined, mildly thickened septa (arrows).

View larger version (160K): [in a new window]   Fig. 4B. —59-year-old woman (different from patient in Fig. 3A, 3B) with well-differentiated liposarcoma. Corresponding contrast-enhanced axial T1-weighted image (550/8) shows enhancement of these septa (arrows).

View larger version (133K): [in a new window]   Fig. 5A. —51-year-old man with well-differentiated liposarcoma. Coronal T1-weighted image (TR/TE, 500/16) obtained through right thigh shows predominantly high-signal mass containing multiple mildly thickened septa (arrows).

View larger version (166K): [in a new window]   Fig. 5B. —51-year-old man with well-differentiated liposarcoma. Corresponding coronal T2-weighted image (3,200/85) with fat-saturation shows multiple high-signal foci (arrows) in mass.

View larger version (116K): [in a new window]   Fig. 6. —28-year-old woman with chondroid lipoma. Sagittal T1-weighted image (TR/TE, 600/10) obtained through left chest shows mass posteriorly, which is predominantly high in signal but contains nodular foci of low signal (arrow).

View larger version (121K): [in a new window]   Fig. 7A. —59-year-old woman with osteolipoma. Coronal T1-weighted image (TR/TE, 566/16) obtained through left thigh shows predominantly high-signal mass with multiple, thickened, and nodular septa (arrows).

View larger version (123K): [in a new window]   Fig. 7B. —59-year-old woman with osteolipoma. Corresponding coronal T2-weighted image (3,000/70) with fat-saturation shows several high-signal foci (arrows).

View larger version (124K): [in a new window]   Fig. 8. —45-year-old woman with hibernoma. Coronal T1-weighted image (TR/TE, 500/14) obtained through upper arm shows predominantly high-signal mass with few mildly thickened septa (arrows).

View larger version (122K): [in a new window]   Fig. 9A. —44-year-old man with angiolipoma. Coronal T1-weighted image (TR/TE, 566/16) obtained through right upper thigh shows predominantly high-signal mass with 2-cm region of decreased signal (arrows).

View larger version (166K): [in a new window]   Fig. 9B. —44-year-old man with angiolipoma. Adjacent coronal T2-weighted image (4,033/70) with fat saturation shows ill-defined region of increased signal intensity (black arrows) and more discrete, nodular focus of high signal (white arrow).

View larger version (106K): [in a new window]   Fig. 10. —38-year-old woman with lipoma containing focal fat necrosis. Axial T1-weighted image (TR/TE, 550/10) obtained through distal aspect of right humerus shows predominantly high-signal mass with focal cluster of ill-defined mildly thickened septa (arrow).

View larger version (127K): [in a new window]   Fig. 11. —59-year-old man with simple lipoma. Coronal T1-weighted image (TR/TE, 500/14) obtained through left thigh shows predominantly high-signal mass that contains multiple mildly thickened and nodular septa (arrows).

View larger version (137K): [in a new window]   Fig. 12. —56-year-old woman with intramuscular lipoma. Axial T1-weighted image (TR/TE, 600/10) obtained through right humerus shows discrete, homogeneously high-signal intramuscular mass (arrow).

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