Myelofibrosis
A rare bone-marrow disorder in which the marrow becomes progressively scarred (fibrosed), crowding out normal blood-cell production. Blood cells then get made in the spleen and liver, which enlarge. It causes anaemia, an enlarged spleen, and characteristic teardrop-shaped red cells on the blood film.
What it is
Myelofibrosis is one of the myeloproliferative neoplasms — chronic blood cancers driven by an abnormal marrow stem cell (often with a JAK2, CALR or MPL gene mutation). Over time the abnormal cells release signals that cause scar tissue (fibrosis) to build up inside the bone marrow, gradually replacing the normal cell-producing tissue. As the marrow becomes unable to make enough blood cells, the body compensates by making them in the spleen and liver — a process called extramedullary haematopoiesis — which causes these organs, especially the spleen, to enlarge, sometimes markedly. The result is a mixed and evolving blood picture: anaemia is common and often needs transfusion, while the white cells and platelets may be high early on and fall as the disease advances. A hallmark clue is the blood film, which shows teardrop-shaped red cells and a 'leucoerythroblastic' picture (immature red and white cells pushed out of the stressed marrow), with a raised LDH. Symptoms include fatigue and breathlessness from anaemia, an uncomfortable or full abdomen from the big spleen, weight loss, night sweats, itching and bone pain. Myelofibrosis can be primary or develop from another myeloproliferative condition. Its course varies from indolent to progressive, and it carries a risk of transforming into acute leukaemia.
Key lab markers
- Haemoglobin — usually low (anaemia), often transfusion-dependent as it progresses.
- Platelets and white cells — variable: often high early, then falling as the marrow scars.
- LDH — typically raised, reflecting the ineffective, stressed cell turnover.
- Blood film — teardrop-shaped red cells and immature red and white cells (leucoerythroblastic picture) are characteristic.
- Bone-marrow biopsy — shows the fibrosis and confirms the diagnosis; JAK2/CALR/MPL genetic testing supports it.
Symptoms
- Tiredness, weakness and breathlessness (from anaemia)
- A full, uncomfortable abdomen or early fullness when eating (from an enlarged spleen)
- Weight loss
- Night sweats and fevers
- Itching
- Bone and joint pain
- Easy bruising or bleeding as platelets fall
Related lab panels
When to discuss with a doctor
Myelofibrosis is a chronic blood cancer diagnosed and managed by a haematologist. It is often suspected when someone has an unexplained anaemia together with an enlarged spleen, or when a blood film shows the tell-tale teardrop-shaped red cells and immature cells, or when platelet and white-cell counts behave oddly over time. Those findings prompt referral for a bone-marrow biopsy — which shows the fibrosis and confirms the diagnosis — and genetic testing for the driver mutations. Management is tailored to the individual, from monitoring and supportive care to targeted drugs (JAK inhibitors) and, in selected younger patients, a stem-cell transplant. Mediora.AI can surface the suggestive pattern — an anaemia with a raised LDH, shifting platelet and white-cell counts, and blood-film abnormalities noted on your report — but this is a specialist diagnosis and the bone-marrow work-up and treatment belong with a haematologist.