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Pleomorphic liposarcoma: a cytologic study of five cases.

Leslie G Dodd1, Xiaoyin Sara Jiang, Kathleen Rao

  • 1Department of Pathology, University of North Carolina at Chapel Hill, North Carolina.

Diagnostic Cytopathology
|March 22, 2014
PubMed
Summary

Pleomorphic liposarcoma is a rare, high-grade sarcoma lacking genetic markers. Cytologic analysis reveals characteristic lipoblasts and fat vacuoles, distinguishing it from other liposarcoma types.

Keywords:
fine needle aspirationliposarcomapleomorphic liposarcoma

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Area of Science:

  • Oncology
  • Cytopathology
  • Surgical Pathology

Background:

  • Pleomorphic liposarcoma is an exceptionally rare variant of liposarcoma.
  • It is characterized by a poor prognosis and absence of a distinct molecular or genetic signature.
  • Histologically, it is defined as a high-grade sarcoma with variable lipoblast content.

Observation:

  • This study describes the cytologic features of five histologically confirmed cases of pleomorphic liposarcoma.
  • Consistent cytologic findings included numerous lipoblasts and micro/macrovesicular fat vacuoles.
  • These features were observed within a background of cellular, pleomorphic sarcomatoid neoplasms.

Findings:

  • The cytologic appearance of pleomorphic liposarcoma aspirates differs significantly from other liposarcoma variants.
  • Key diagnostic features include the presence of numerous lipoblasts and varied fat vacuole sizes.
  • The sarcomatoid nature of the neoplasm is also a notable cytologic observation.

Implications:

  • Accurate cytologic identification of pleomorphic liposarcoma is crucial for appropriate patient management.
  • Distinguishing this rare variant from other liposarcomas based on cytology can guide further diagnostic and therapeutic strategies.
  • Further research into potential molecular markers, despite current absence, may improve future prognostication and treatment of pleomorphic liposarcoma.