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Glioblastoma multiforme with epithelial appearance: a case report
1Department of Neurosurgery, Holy Spirit Hospital, Nagoya, Japan. kyozokato@hotmail.com
Brain Tumor Pathology
|October 26, 1999
Summary
This case study details a rare glioblastoma multiforme presenting with an epithelial appearance, initially posing diagnostic challenges. Subsequent analyses confirmed neoplastic astrocytes with characteristic glioblastoma features, despite initial GFAP-negative staining.
Area of Science:
- Neuro-oncology
- Pathology
- Surgical Oncology
Background:
- Glioblastoma multiforme (GBM) is an aggressive primary brain tumor.
- GBM typically exhibits glial differentiation, but rare variants can mimic other neoplasms.
- Accurate diagnosis is crucial for appropriate treatment and patient management.
Observation:
- A glioblastoma multiforme case presented with an unusual epithelial morphology, complicating initial diagnosis.
- Microscopy showed densely packed, anaplastic cells with tubular, gland-like patterns resembling epithelial neoplasms.
- Initial glial fibrillary acidic protein (GFAP) immunostaining was largely negative in these areas.
Findings:
- Further pathological examination across multiple surgeries confirmed the tumor as neoplastic astrocytes.
- Characteristic glioblastoma features, including necrosis, pseudopalisading, and endothelial proliferation, were identified.
- A significant proportion of tumor cells were GFAP-positive in later analyses, confirming glial origin.
Implications:
- This case highlights the diagnostic challenges posed by rare morphologic variants of glioblastoma.
- It underscores the importance of comprehensive pathological evaluation, including serial sampling and advanced immunostaining.
- Understanding these rare presentations is vital for improving diagnostic accuracy and therapeutic strategies in neuro-oncology.