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Cerebral pleomorphic liposarcoma: Clinicopathologic findings.

Dora Verdugo, Lysandra Voltaggio, Andrew Hoot

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    Pleomorphic liposarcoma, a rare cancer, can exceptionally occur in the brain. This case highlights its potential presentation as an isolated intracranial mass, requiring consideration in brain tumor diagnostics.

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    Area of Science:

    • Neuropathology
    • Oncology
    • Rare Cancers

    Background:

    • Pleomorphic liposarcoma is an extremely rare subtype of liposarcoma.
    • Central nervous system involvement by pleomorphic liposarcoma is highly exceptional.

    Observation:

    • A 62-year-old woman presented with an intraparenchymal brain mass in the left frontoparietal lobes.
    • Histological examination revealed a mesenchymal neoplasm characterized by pleomorphic lipoblasts and a dense reticulin network.

    Findings:

    • Immunohistochemical staining confirmed intracytoplasmic vacuoles with adipophilin.
    • MDM2 immunostain was negative, aiding in the differential diagnosis.
    • The final diagnosis was pleomorphic liposarcoma, with no evidence of an extracranial primary tumor.

    Implications:

    • Pleomorphic liposarcoma can manifest as a solitary intracranial mass.
    • This rare entity should be considered in the differential diagnosis of pleomorphic brain tumors.
    • Highlights the importance of comprehensive histopathological and immunohistochemical analysis for rare intracranial neoplasms.