Dysplastic Gangliocytoma: A Rare Example of Cerebellar Tumor with An Evident Genetic Profile (Cowden Syndrome)

Objective: To describe the histological and immunohistochemical findings observed when studying a dysplastic cerebellar gangliocytoma observed in a 33-year-old man with a history of Thyroid Cancer. Material and Methods: Radiological images (MRI) and histological and immunohistochemical preparations obtained from the cerebellar tissue were received in our laboratory. Results: A neoplasm constituted by aberrant-looking mature neurons was observed that showed negativity for the immunohistochemical markers of the PTEN protein, expression of the activity of the PTEN gene. Conclusions: Verify the diagnosis of a rare entity, clearly related in scientific publications with Cowden’s Syndrome.