Intraoperative Imprint-squash Methods in Central Nervous System Tumors

Area of Science:

• Neuropathology
• Oncology
• Cytopathology

Background:

• Central nervous system (CNS) tumors are the seventh leading cause of cancer death in developed countries.
• CNS tumors are characterized by their soft, gelatinous texture.
• Accurate and timely diagnosis is crucial for effective treatment of brain tumors.

Purpose of the Study:

• To evaluate the diagnostic accuracy of smear techniques (imprint and squash cytology) for intracranial tumors.
• To assess the feasibility and efficiency of smear cytology in a clinical setting.
• To determine the reliability of smear cytology in differentiating benign from malignant brain tumors.

Main Methods:

• A study involving 100 cases of intracranial tumors undergoing surgical resection.
• Preparation and examination of imprint and squash cytology smears.
• Comparison of cytological findings with histopathological results from paraffin-embedded tissue sections.

Main Results:

• The smear technique demonstrated a 90% accuracy rate in the differential diagnosis of malignant versus benign tumors.
• Misdiagnoses primarily occurred with solid-hard tumors, epithelial-grade cystic structures, and specific tumor types like medulloblastoma and ependymoma.
• The method proved convenient due to its technical simplicity, low cost, and minimal equipment requirements.

Conclusions:

• Smear technique is a highly effective, rapid, and economical method for the intraoperative diagnosis of brain tumors.
• Despite limitations with certain tumor types, its practical advantages make it a valuable tool for neuropathologists.
• The ease of use and cost-effectiveness support the widespread adoption of smear cytology in diagnosing CNS tumors.