Pineal cyst

Glial Cyst, Simple Cyst, Pineal Cyst, and Wall of Syrinx... 

Important characteristics of carcinoma as it relates to the CNS and meninges are its distinctively epithelial structure (Fig. 20.58A see Table 20.6) and the overwhelming predominance of metastatic over primary carcinomas. Metastatic carcinomas are described in detail in Chapter 8, Immunohistology of Metastatic Carcinomas of Unknown Primary. Rare primary brain carcinomas occur in the choroid plexus, from germ cell tumors of the pineal and suprasellar regions, and from cysts. 725 section emphasizes how to distinguish between carcinomas (see Fig. 20.58B to D) and various primary intracranial tumors (see Box 20.2). 

Glial cyst, simple cyst. Wall of gliosis Rosenthal GFAP in glial filaments (-I-) Pineal, cerebellum. 

Epidermoid cyst Fibrous wall lined by inner keratinizing stratified squamous epithelium cyst contains waxy squames Keratin (-r) CP angle temporal lobe spinal dura pineal sella brainstem CNS... 

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