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Start free with EleplanHeavy chain deposition disease
ORPHA:93556Clinical subtype
Also called HCDD
What it is
A rare non-amyloid monoclonal immunoglobulin deposition disease characterized by production of monoclonal immunoglobulins with truncated heavy chains and no detectable light chains, which are deposited in tissues and cause organ dysfunction, but do not form amyloid beta-pleated sheets or contain an amyloid P component. The condition frequently occurs in association with multiple myeloma. Patients most commonly present with renal involvement (manifesting as hypertension, progressive renal dysfunction, anemia, and nephrotic syndrome with microhematuria), but other organs (such as the liver or skin) may also be affected. Production of IgG1 or IgG3 isotypes results in hypercomplementemia.
Key facts
- Classified as
- Clinical subtype
Recorded for the broader condition
- Age of onset
- AdultNon-amyloid monoclonal immunoglobulin deposition 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.
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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