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Start free with EleplanMacular amyloidosis
ORPHA:137814Disease
What it is
Macular amyloidosis (MA) is a rare chronic form of cutaneous amyloidosis, a skin disease characterized by the accumulation of amyloid deposits in the dermis, clinically characterized by pruritic hyperkeratotic gray-brown macules that give a rippled or reticulated pattern of pigmentation usually in the upper back and extensor sites of arms, forearms and legs, and histologically by the deposition of amyloid in the upper dermis and close to the basal cell layer of the epidermis. MA is commonly associated with other skin diseases, such as atopic dermatitis.
Key facts
- Classified as
- Disease
Recorded for the broader condition
- Prevalence
- 1-9 / 100 000 (Taiwan, Province of China)Primary cutaneous amyloidosis
- Age of onset
- All agesPrimary cutaneous amyloidosis
- Inheritance
- Autosomal dominant, Not applicablePrimary cutaneous amyloidosis
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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