Table 2.

Staining characteristics of various central nervous system tumors

Tumor	Staining characteristics
Low-grade astrocytoma (2 cases)	++
Anaplastic astrocytoma (2 cases)	++
Glioblastoma multiforme (4 cases)	++
Medulloblastoma (4 cases)	++
Dysplastic gangliocytoma of cerebellum (1 case)	++ (glial population) – (neuronal population)
Ganglioglioma (1 case)	++ (glial population) – (neuronal population)
Paraganglioma of the filum terminale	++
Central neurocytoma	+

Symbols used: –, negative for PTB; +, positive for PTB; ++, strongly positive for PTB.