Paraganglioma natural history, complications, and prognosis

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Overview
A paraganglioma is a rare neoplasm that can be found in the abdomen, thorax, and in the head and neck region. They are usually considered benign and complete surgical removal results in cure. However, in about 3% of cases they are malignant and have the ability to metastasize. Paragangliomas are still sometimes called glomus tumors (not to be confused with glomus tumors of the skin) and chemodectomas, but paraganglioma is the currently accepted and preferred term.

Possible complications
The most common complications are due to nerve damage, which may be caused by the tumor itself or damage during surgery. Nerve damage can lead to:


 * Change in voice
 * Difficulty swallowing
 * Hearing loss
 * Paralysis of the face

(Outlook/Prognosis)
Patients who have surgery or radiation tend to do well. More than 90% of those with paraganglioma are cured.