Chris Buck is a violin virtuoso and teacher. He lost his hearing due to latent radiation damage; radiation was part of the cancer therapy he had to endure nearly 14 years ago for a rare adult brain tumor. This does not cite its references or sources. ... Post-lingual hearing impairment is a hearing impairment where hearing loss is adventitious and develops due to disease or trauma after the acquisition of speech and language, usually after the age of six. ... Radiation in physics is the process of emitting energy in the form of waves or particles. ... It has been suggested that Cancerous tumor be merged into this article or section. ... A brain tumour is any intracranial tumor created by abnormal and uncontrolled cell division, normally either found in the brain itself (neurons, glial cells (astrocytes, oligodendrocytes, ependymal cells), lymphatic tissue, blood vessels), in the cranial nerves (myelin-producing Schwann cells), in the brain envelopes (meninges), skull, pituitary and pineal gland...