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Living with Familial primary localized cutaneous amyloidosis

A rare inherited skin condition with itchy bumps or dark patches caused by protein deposits in the skin.

Understanding Familial primary localized cutaneous amyloidosis

Familial primary localized cutaneous amyloidosis is a rare skin condition in which a protein called amyloid builds up in the top layer of the skin.

People may have an itchy rash of grouped, thick bumps that can merge into plaques, usually on the lower legs (lichen amyloidosis). Others have dark patches, sometimes in a net-like pattern, on the back, chest or between the shoulder blades (macular amyloidosis). It can start at any time in life.

Signs & symptoms

GARD doesn't list a separate symptom list. Its summary describes:

  • Itchy rash of grouped bumps
  • Thick plaques, often on the lower legs
  • Dark patches on the back or chest
  • Net-like skin patterns

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include genetic specialists and skin, hair, and nail specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Amyloidosis Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Genetic specialists (geneticists); Skin, hair, and nail specialists (dermatologists)
Expert care
Expert lists: Amyloidosis Foundation
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Amyloidosis Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which type of skin amyloidosis do I have?
What can help with the itching?
Should my relatives have their skin checked?

Quick facts

Symptoms usually startany time in life
InheritanceAutosomal Dominant

Changes in genes cause it. It is autosomal dominant, which means one changed copy of a gene is enough. GARD doesn't name the gene.

GeneticSkin

Also known as: familial localized cutaneous amyloidosis; fplca; hereditary primary cutaneous amyloidosis

Patient organizations

Source: NIH GARD · Familial primary localized cutaneous amyloidosisGARD ID 17533 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Familial primary localized cutaneous amyloidosis.

Explore the Familial primary localized cutaneous amyloidosis blog

Explore research for Familial primary localized cutaneous amyloidosis

Explore actively recruiting Familial primary localized cutaneous amyloidosis studies with HealthSpark.

HealthSpark

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  • Eligibility is confirmed by the study team

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