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Living with Acquired thrombotic thrombocytopenic purpura

A blood disorder in which small clots form in blood vessels and platelets run low, causing bruising and organ problems.

Understanding Acquired thrombotic thrombocytopenic purpura

Acquired thrombotic thrombocytopenic purpura (TTP) is a blood disorder with low platelets, small bleeds under the skin, and anemia.

Small clots form in blood vessels around the body, and they can reduce blood flow to the brain, kidneys, and heart. Problems may include headaches, confusion, slurred speech, fever, belly pain, and heart or kidney problems. Anemia can cause paleness, yellow skin, and tiredness. An episode usually starts suddenly and lasts days to weeks. Relapses can occur in up to 60 percent of people. GARD lists onset as any time in life.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Low platelet count (thrombocytopenia)
  • Confusion and headache
  • Fever
  • Fatigue and weakness
  • Abdominal pain
  • Blood in the urine

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 blood and bone marrow specialists and kidney specialists.

  3. Ask which tests can help

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

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); Kidney specialists (nephrologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
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 Platelet Disorder Support Association 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
How can I tell early if a TTP relapse is starting?
How often should my ADAMTS13 level and blood counts be checked?
Which specialist, such as a hematologist, should follow me?

Quick facts

Symptoms usually startany time in life

The body mistakenly makes antibodies that block the activity of the ADAMTS13 enzyme, which normally helps control blood clotting factors.

KidneyBlood

Also known as: acquired adamts13 deficiency; acquired thrombotic thrombocytopenic purpura (ttp); acquired ttp; attp; autoimmune thrombotic thrombocytopenic purpura; idiopathic thrombotic thrombocytopenic purpura

Patient organizations

Source: NIH GARD · Acquired thrombotic thrombocytopenic purpuraGARD ID 4607 · 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

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