Chromosomal abnormalities in a pineocytoma

Chromosomal abnormalities in a pineocytoma.

Tumors of the pineal region represent about 0.4-1% of intracranial neoplasms, including those tumors of germ cell origin (primarily germinomas and teratomas, which represent about 80% of pineal malignancies), and those tumors of the pineal parenchyma (pineocytoma and pineoblastoma). Pineocytoma is composed of relatively mature cells of the pineal parenchyma, whereas pineoblastoma represents a m...

Chromosomal Abnormalities in Reimplantation Development

Direct testing of the outcome of human female meiosis demonstrated that up over a half of oocytes from IVF patients of advanced reproductive age are aneuploid, originating comparably from meiosis I and meiosis II errors, with potential probability of aneuploidy rescue in an almost half of oocytes with sequential first and second meiotic errors. One fifth of abnormalities originating from meiosi...

Chromosomal abnormalities in Hodgkin's disease.

Numerous neoplastic states have associated or causal cytogenetic abnormalities. In some cancers, specific chromosomal abnormalities appear to correlate with the clinical characteristics and prognosis. Cytogenetic analysis of Hodgkin's disease is thought to be technically difficult and only a small number of cases with evaluable results have been reported. We have attempted cytogenetic studies o...

Epilepsy and chromosomal abnormalities

BACKGROUND Many chromosomal abnormalities are associated with Central Nervous System (CNS) malformations and other neurological alterations, among which seizures and epilepsy. Some of these show a peculiar epileptic and EEG pattern. We describe some epileptic syndromes frequently reported in chromosomal disorders. METHODS Detailed clinical assessment, electrophysiological studies, survey of t...

Frequency and the Type of Chromosomal Abnormalities in Patients with Primary Amenorrhea in Northeast of Iran