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ORPHA:137814

Macular amyloidosis

high confidenceDisorder

Publications

349

75.5th percentile

Trials

2

Interventional, condition-specific

Researchers

813

Distinct authors in sample

Gene link

—

Readiness

2/6

Stages with a signal

Clinical definition (Orphanet)

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.

Orphanet entry

Cross-references

Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.

Research stages

Trial readiness signals

Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”

2/6 stages with a signal

An interventional trial matched this condition name on ClinicalTrials.gov — see trials below.

  1. Gene identifiedNot found

    No GenCC disease–gene assertion in this build

  2. LiteraturePresent

    349 matched papers (164 in last 10 years) Source

  3. Phenotype characterisedNot checked

    Not yet enriched from Monarch / HPO

  4. Animal modelNot checked

    Not yet enriched from Monarch / Alliance

  5. Orphan designationNot checked

    FDA/EMA orphan-drug designation not enriched yet

  6. Interventional trialPresent

    2 matched on ClinicalTrials.gov (1 recruiting in sample)

Biology

Genes and phenotypes

Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.

Do we know what causes it?

Not yet — the cause hasn't been pinned down in GenCC.

No strong gene–disease assertion joined for this Orphanet entity.

Phenotypes (Monarch / HPO)

Not enriched in this build — Monarch phenotype joins were not run for this record.

Animal models (Monarch / Alliance)

Not enriched in this build.

Literature

Is anyone studying this?

349

349 papers have ever been published on this condition (under this name). For scale, breast cancer has over 700,000. Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=5449) is 41.

349 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 41 (publications denominator n=5449).

164 in the last 10 years · high confidence · 75.5th percentile (publications denominator)

Phrase hits: 349 · MeSH hits: 0

Open Europe PMC search

Who's working on it?

813

Distinct author names in 200 sampled papers — named people below.

Who's working on it?

People publishing on this condition (sampled Europe PMC records). Affiliation is the most recent found in that sample.

  1. 01
    Chander R5 papers · 2022

    Department of Dermatology and STD, Lady Hardinge Medical College and Associated Hospitals, New Delhi, India.

    Papers in Europe PMC
  2. 02
    Yadav A5 papers · 2022

    Department of Dermatology and STD, Lady Hardinge Medical College and Associated Hospitals, New Delhi, India.

    Papers in Europe PMC
  3. 03
    Errichetti E4 papers · 2024

    Department of Experimental and Clinical Medicine, Institute of Dermatology, University of Udine, Udine, Italy. enzoerri@yahoo.it.

    Papers in Europe PMC
  4. 04
    Nahidi Y4 papers · 2023

    Department of Dermatology, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.

    Papers in Europe PMC
  5. 05
    Wang X4 papers · 2026

    Department of Dermatology, No. 1 Hospital, Anhui Medical University, Hefei, China.

    Papers in Europe PMC
  6. 06
    Abbas O3 papers · 2021

    Department of Dermatology, American University of Beirut Medical Center, Riad El Solh/Beirut, P.O. Box 11-0236, Beirut, 1107 2020, Lebanon. oa09@aub.edu.lb.

    Papers in Europe PMC
  7. 07
    Cohen PR3 papers · 2024

    Department of Dermatology, University of California, San Diego.

    Papers in Europe PMC
  8. 08
    Guo Z3 papers · 2025

    Department of Dermatology, No. 1 Hospital, Anhui Medical University, Hefei, China.

    Papers in Europe PMC
  9. 09
    Li H3 papers · 2025

    Department of Dermatology, No. 1 Hospital, Anhui Medical University, Hefei, China.

    Papers in Europe PMC
  10. 10
    Tan C3 papers · 2021

    Department of Dermatology, First Affiliated Hospital of Nan Jing University of Traditional Chinese Medicine, Jiang Su Province, Nan Jing, China. Head of Department: Prof. Zhong-Sheng Min.

    Papers in Europe PMC

Clinical research

Is a treatment being tested?

2

interventional trials for this specific condition

2 interventional trials matched this specific condition name; 1 currently recruiting in our sample. 367 trials are registered for amyloidosis, the broader category — shown separately because they may or may not enrol this specific subtype.

Data as of 27 July 2026

2 interventional trials — more than 73% of diseases in the trials denominator have none at all (5114 of 7003; this disease is at the 82.4th percentile).

high confidence · 82.4th percentile (trials denominator)

Recruiting interventional trials

From the matched ClinicalTrials.gov set

2 interventional trials matched after quoted-phrase search and title/condition post-filter.

Broader category: amyloidosis

367

Interventional trials for the parent category, exclusive of NCT IDs already counted above. Eligibility for this subtype is not guaranteed.

Worth raising with a clinician. How we count trials.

Recruiting under the broader category

Where to find support

We do not yet link condition-specific patient organisations. These umbrella groups support undiagnosed and ultra-rare families:

India — NPRD

Last verified 2026-07-26

This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.

Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.

How we counted this

Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.

"Macular amyloidosis"

Run this search on Europe PMC

ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):

"Macular amyloidosis"

Interventional trials matched via: phrase (mesh = registered under a MeSH descriptor no name phrase would catch; recall-expansion = gene / selected parent terms used only for trials).

Study-type breakdown: 2 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.

Parent-category trials query:

"amyloidosis"

Query health: ok — strategies attempted: phrase; with hits: phrase

Run this search on ClinicalTrials.gov

Confidence reasoning

  • Preferred label is multi-word and distinctive
  • No synonyms dropped by stoplist
  • No label/synonym collisions with other diseases in this corpus

Ingested 2026-07-27T07:29:23.136Z