Cytologic findings in malignant ependymoma: a case report.

Background: Intraoperative imprint cytology has proved to be a valuable tool in the diagnosis of central nervous system (CNS) tumors. Ependymomas are uncommon glial neoplasms of the CNS, arising from ependymal lining of the ventricular system and central canal of the spinal cord. Anaplastic ependymoma is a rare tumor that causes diagnostic difficulties in imprint cytology because of variable cytomorphologic findings.

Cytologic findings in pigmented melanotic schwannoma: a case report.

Background: Psammomatous melanotic schwannoma (PMS) is a rare pigmented neural tumor most commonly occurring in the paraspinal region. This rare tumor can cause diagnostic difficulties in imprint cytology due to cellular details masked by heavy melanin pigments.

Case: A 37-year-old man presented with an 8-month history of lower back pain with no stigmata of Carney's syndrome on physical examination.

Primary burkitt lymphoma of the brain in an immunocompetent patient. Case report.

Primary central nervous system (CNS) lymphoma is rare and is most often seen in immunodeficient patients. The majority of these tumors are the non-Hodgkin type and are high grade. Primary Burkitt lymphoma of the CNS in immunocompetent individuals has rarely been reported.