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Choroidal nevus (plural: nevi) is a type of eye neoplasm that is classified under choroidal tumors as a type of benign (non-cancerous) melanocytic tumor. [1] A choroidal nevus can be described as an unambiguous pigmented blue or green-gray choroidal lesion, found at the front of the eye, around the iris, [2] or the rear end of the eye.
Choroid plexus papilloma, also known as papilloma of the choroid plexus, is a rare benign neuroepithelial intraventricular WHO grade I lesion found in the choroid plexus. [1] It leads to increased cerebrospinal fluid production, thus causing increased intracranial pressure and hydrocephalus .
An eye neoplasm is a tumor of the eye. [1] A rare type of tumor, [2] eye neoplasms can affect all parts of the eye, and can either be benign or malignant , in which case it is known as eye cancer. [3] Eye cancers can be primary (starts within the eye) or metastatic cancer (spread to the eye from another organ).
Variably pigmented, mushroom-shaped choroidal tumor has ruptured the Bruch membrane and grown into the subretinal space. Benign melanocytic tumors of the choroid, such as choroidal freckles and nevi, are very common and pose no health risks, unless they show signs of malignancy, in which case they are considered melanomas.
209.5 Benign carcinoid tumors of the appendix, large intestine, and rectum 209.6 Benign carcinoid tumors of other and unspecified sites Benign neoplasms (210–229)
Choroid plexus tumors are uncommon tumors of the central nervous system that account for 0.5–0.6% of intracranial neoplasms in people of all ages. [4] [5] Choroid plexus papilloma, atypical choroid plexus papilloma, and choroid plexus carcinoma are the three World Health Organization types for these neoplasms. [6]
This is a shortened version of the sixth chapter of the ICD-9: Diseases of the Nervous System and Sense Organs.It covers ICD codes 320 to 389.The full chapter can be found on pages 215 to 258 of Volume 1, which contains all (sub)categories of the ICD-9.
A benign tumor is a mass of cells that does not invade neighboring tissue or metastasize (spread throughout the body). Compared to malignant (cancerous) tumors, benign tumors generally have a slower growth rate. Benign tumors have relatively well differentiated cells.