oPatientPlus articles are written by UK doctors and are based on research evidence, UK and European Guidelines. They are designed for health professionals to use, so you may find the language more technical than the condition leaflets.
The spleen is involved in producing protective humoral antibodies, the production and maturation of B and T cells and plasma cells, removal of unwanted particulate matter (eg bacteria) and it also acts as a reservoir for blood cells, especially white cells and platelets. When the spleen is palpable it has usually reached at least twice its normal size.
- Left upper quadrant (LUQ) mass or 'uncomfortable' abdominal pain; early satiety from compressed stomach.
- Pancytopenia due to hypersplenism (see 'Hypersplenism' heading, below).
When considering whether an LUQ mass is an enlarged spleen, features of an enlarged spleen include that:
- It moves with respiration.
- It enlarges towards the right iliac fossa (RIF) - always start palpation in the RIF and move across towards the right upper quadrant (or a massive splenomegaly may be missed).
- You cannot palpate above it - the upper margin lies under the ribs.
- You may feel a notch.
- It is dull to percussion.
Always remember to check for any accompanying lymphadenopathy and/or features of liver disease.
- Tumours and cysts:
- Congestive splenomegaly:
- Connective tissue disorders:
- Other disorders:
Causes of massive splenomegaly
- Chronic myeloid leukaemia.
- Myelofibrosis, malaria (hyper-reactive malarial splenomegaly).
- 'Tropical splenomegaly' (idiopathic; Africa, South-east Asia).
- Gaucher's syndrome.
Splenomegaly in children
This is most commonly caused by infection, autoimmune disorders or haemolysis. It may be a presenting feature of neoplasia (eg metastatic neuroblastoma). Causes include:
- Infection: glandular fever, cytomegalovirus (CMV), other viral infections, often accompanied by lymphadenopathy; bacterial, protozoal, and fungal infections.
- Autoimmune: juvenile rheumatoid arthritis.
- Haemolysis: hereditary spherocytosis, sickle cell anaemia, thalassaemia.
- Neoplasia: acute lymphoblastic leukaemia (ALL), Hodgkin's disease and Non-Hodgkin's lymphoma (NHL), acute or chronic myeloblastic leukaemia, neuroblastoma.
- Inherited diseases: Gaucher's disease and other storage disorders.
- This is a pancytopenia occurring in patients with an enlarged spleen. It is due to large numbers of cells being pooled and destroyed in the spleen's reticulo-endothelial system, and haemodilution because of an increased plasma volume.
- It can present with symptoms of anaemia, infection, or bleeding.
- Bone marrow biopsy shows normal or hyperplastic marrow.
- Splenic sequestration crisis may develop in young children with sickle cell anaemia, which can precipitate hypovolaemic shock and death, and is an indication for splenectomy.
- Treatment of the cause.
- Blood transfusions may be required.
- Open or laparoscopic splenectomy may be indicated to control or stage the disease (eg hereditary spherocytosis, Hodgkin's disease).
- Patients with impaired splenic function need prophylactic vaccinations etc. (see separate article Splenectomy, Hyposplenism and Asplenia).
Further reading & references
- Pozo AL, Godfrey EM, Bowles KM; Splenomegaly: investigation, diagnosis and management. Blood Rev. 2009 May;23(3):105-11. Epub 2008 Dec 4.
Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. EMIS has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.
Dr Colin Tidy
Dr Gurvinder Rull