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Living with Myelodysplastic syndrome associated with isolated del(5q)

A type of bone marrow disorder (5q- syndrome) that mainly causes a shortage of red blood cells.

Understanding Myelodysplastic syndrome associated with isolated del(5q)

Myelodysplastic syndrome associated with isolated del(5q), or 5q- syndrome, is a bone marrow disorder that mainly causes a shortage of red blood cells.

In 5q- syndrome, red blood cell development is especially affected, leading to anemia, with red cells that are unusually large. Many people have no anemia symptoms early on. Later, some have extreme tiredness, weakness, and pale skin. Platelet levels may be high or normal. MDS is considered a slow-growing (chronic) blood cancer, and can progress to acute myeloid leukemia (AML), but this is less common with 5q- syndrome.

Signs & symptoms

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

  • Low red blood cells (macrocytic anemia)
  • Extreme tiredness (fatigue)
  • Weakness
  • Pale skin (pallor)
  • High platelet count (thrombocytosis)
  • Changes in bone marrow cells

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 cancer 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); Cancer specialists (oncologists)
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 Blood Cancer United 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 often should my blood counts be checked?
What treatment options are there for anemia?
How often is the risk of progression to AML reviewed?

Quick facts

Symptoms usually startAdult

GARD doesn't describe a cause for this condition yet.

Blood

Also known as: 5q minus syndrome; 5q- syndrome; 5q- syndrome, refractory macrocytic anaemia due to 5q deletion; 5q- syndrome, refractory macrocytic anemia due to 5q deletion; chromosome 5q deletion syndrome; macrocytic anemia, refractory, due to 5q deletion, somatic

Patient organizations

Source: NIH GARD · Myelodysplastic syndrome associated with isolated del(5q)GARD ID 8723 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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