Intraoperative Touch Imprint Cytology of Brain Neoplasms: A Useful High-Diagnostic Tool in 93 Consecutive Cases; Differential Diagnoses, Pitfalls, and Traps

Table 4

Correlation of touch imprint cytology and final histopathological diagnosis.

Cytologic diagnosis	Histopathologic diagnosis	Total number of cases
High-grade glioma	Glioblastoma, Grade 4	15
Nondiagnostic samples	Glioblastoma, Grade 4	1
Low-grade glioma	Astrocytoma, Grade 2	10
Low-grade glioma	Pilocytic astrocytoma, Grade 1	4
High-grade glioma	Oligodendroglioma, Grade 3	2
Low-grade ependymoma	Ependymoma, Grade 1	1
High-grade ependymoma	Ependymoma, Grade 3	1
Nonneoplastic and hamartomatous lesions	Gliosis, radiation-induced change, cortical tubers	3
Meningioma	Meningioma, Grade 1	11
Meningioma	Meningioma, atypical Grade 2	4
Spindle cell lesions	Schwannoma, neurofibroma, hybrid nerve sheath tumor, Grade 1	4
Nondiagnostic	Hemangioblastoma, Grade 1	1
Adenoma	Pituitary adenoma/apoplexy	2
Benign; vascular neoplasia	Hemangioma	1
Nonneoplastic, granulomatous inflammatory processes	Hydatid cyst	1
Small blue cell tumor	Embryonal tumor with multilayered rosettes, Grade 4	1
Metastatic, epithelial	Carcinoma	25
Atypical lymphoid proliferation	Hematolymphoid neoplasm	3
Malignant lymphoma	Diffuse large B-cell lymphoma (DLBCL)	2
Malignant, spindle cell lesion	BCOR internal tandem duplication of the soft tissue	1
Total	—	93