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Start free with EleplanUnicentric Castleman disease
ORPHA:93685Clinical subtype
Also called Localized Castleman disease
What it is
A rare lymphoid hemopathy characterized by involvement of a single lymph node or a group of lymph nodes in one lymph node station (most commonly in the mediastinum, neck, abdomen, or retroperitoneum). Histopathologically, it may occur as a hyaline vascular subtype with hyaline-vascular follicles and a fibrotic and hypervascular stroma with sinus compression, or a mixed/plasmacytic subtype with dense, interfollicular sheets of (usually polytypic) plasma cells extending to the cortex, and variably sized lymphoid follicles including some with regressive changes. Clinically, most patients are asymptomatic, and lesions are detected incidentally.
Key facts
- Prevalence
- 1-9 / 100 000 (annual incidence, United States)
- Age of onset
- All ages
- Classified as
- Clinical subtype
Recorded for the broader condition
- Inheritance
- Not applicableCastleman disease
Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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