This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Unicentric Castleman disease (UCD) is a rare condition that affects the lymph nodes and related tissues. It is a form of Castleman disease that is “localized” to a single set of lymph nodes (as opposed to multicentric Castleman disease which has more widespread effects). UCD often starts as an enlarged lymph node. Depending on the location of this enlarged node, some people will have no additional features of the condition, while others will develop symptoms when it pushes on nearby organs and/or tissues. The exact underlying cause of UCD is currently unknown. Treatment typically includes surgical removal of the affected lymph node.
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