Intraventricular Tumors

Brain tumors located in the ventricles constitute 1.4% of all primary central nervous system tumors, and 5.4% of all central nervous tumors in the pediatric age group [1]. The most common primary neoplasms of the third ventricle are neuroepithelial tumors [2]. These tumors include juvenile pilocytic astrocytoma, astrocy-toma, subependymal giant cell astrocytoma, ependymoma and glioblastoma multiforme. Although juvenile pilocytic astrocytomas most often originate from the floor of the third ventricle, they may arise from the posterior pituitary or optic system and extend into the ventricle. Low-grade astrocytomas, as well as anaplastic astrocytoma and glioblastoma multiforme, typically originate from the thalamic region. Ependymomas, and less frequently subependymomas, originate from the ventricular wall. These lesions are more common in the lateral ventricles. Subependymal giant cell astrocytoma, which may be associated with tuberous sclerosis, often originates at the foramen of Monro and is more frequently seen in the lateral ventricle. Colloid cysts are the most common lesions located in the third ventricle [3]. Although rare, epidermoid and dermoid tumors may occur in the third ventricle, and usually are solid rather than cystic at this location. Meningiomas originating from the velum inter-positum and choroid plexus papillomas are also seen in the third ventricle. Craniopharyngioma and suprasellar germinomas can invade the floor of the third ventricle. Another main group of tumors that may grow into the third ventricle originate from the pineal gland and will be discussed in detail later in this chapter. In addition to these primary neoplasms, metastatic tumors may occur in the third ventricle and invade its floor or lateral walls.

Regarding lateral ventricle tumors, in a study excluding tumors that originated in the brain

Cure Your Yeast Infection For Good

Cure Your Yeast Infection For Good

The term vaginitis is one that is applied to any inflammation or infection of the vagina, and there are many different conditions that are categorized together under this ‘broad’ heading, including bacterial vaginosis, trichomoniasis and non-infectious vaginitis.

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