Advertisement

Skeletal Radiology

, Volume 26, Issue 3, pp 150–154 | Cite as

Septum-like structures in lipoma and liposarcoma: MR imaging and pathologic correlation

  • Mariko Hosono
  • Hisataka Kobayashi
  • Ryota Fujimoto
  • Yoshihiko Kotoura
  • Tadao Tsuboyama
  • Yoshitaka Matsusue
  • Takashi Nakamura
  • Tsuyoshi Itoh
  • Junji Konishi
Articles

Abstract

Objective

To investigate the septum-like structures in pre-dominantly lipomatous tumors, by correlating fat-suppressed MR images with histopathologic findings.

Design and patients

The MR findings of three cases of well-differentiated liposarcoma (atypical lipoma), one case of lipoma-like component of dedifferentiated liposarcoma, and nine cases of lipoma were analyzed. T1-, T2-, and fat-suppressed T1-weighted images after Gd-DTPA administration were obtained. Surgical specimens from five patients (four with liposarcoma and one with lipoma) were also scanned with a MR unit, and compared with the pathologic findings.

Results and conclusions

Enhancement features of lipoma and liposarcoma were well visualized on fat-suppressed T1-weighted images after Gd-DTPA administration. The septum-like structures of liposarcoma are thick and enhanced considerably, while septa of lipoma are thin and enhanced only slightly. Pathologically, the septum-like structures of liposarcoma contained muscle fibers and the septa of lipoma represented fibrous capsule. Identification of well-enhanced septa in a predominantly lipomatous tumor helps to differentiate malignant tumors from lipomas. As the septum-like structures of lipo-sarcoma contain a skeletal muscle component the tumor might need more extensive surgical procedures including resection of adjacent muscles.

Key words

Lipoma Liposarcoma Soft tissue tumor MRI 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Jelinek JS, Kransdorf MJ, Shmookler BM, Aboulafia AJ, Malawer MM. Liposarcoma of the extremities: MR and CT findings in the histologic subtypes. Radiology 1993; 186:455–459.CrossRefGoogle Scholar
  2. 2.
    Bush CH, Spanier SS, Gillespy T. Imaging of atypical lipomas of the extremities: report of three cases. Skeletal Radiol 1988; 17:472–475.CrossRefGoogle Scholar
  3. 3.
    Buck JL. Fat-containing soft-tissue masses of the extremities. RadioGraphics 1991; 11:81–106.CrossRefGoogle Scholar

Copyright information

© International Skeletal Society 1997

Authors and Affiliations

  • Mariko Hosono
    • 1
  • Hisataka Kobayashi
    • 2
  • Ryota Fujimoto
    • 1
  • Yoshihiko Kotoura
    • 3
  • Tadao Tsuboyama
    • 4
  • Yoshitaka Matsusue
    • 4
  • Takashi Nakamura
    • 4
  • Tsuyoshi Itoh
    • 5
  • Junji Konishi
    • 1
  1. 1.Department of Nuclear Medicine, Faculty of MedicineKyoto UniversitySakyo-ku, KyotoJapan
  2. 2.Nuclear Medicine DepartmentNational Institutes of HealthBethesdaUSA
  3. 3.Department of Orthopaedic SurgeryNagahama-city HospitalNagahama, ShigaJapan
  4. 4.Department of Orthopaedic SurgeryKyoto UniversityKyotoJapan
  5. 5.Department of RadiologyKyoto National HospitalKyotoJapan

Personalised recommendations