Hepatosplenomegaly

Combined enlargement of liver and spleen, reflecting a shared pathological process affecting both organs rather than a diagnosis in itself.

Broad categories of cause include chronic liver disease with portal hypertension (splenomegaly here is congestive, secondary to the liver process), hematological malignancy (leukemia, lymphoma, myeloproliferative disorders, all covered in separate entries), and infection (malaria, visceral leishmaniasis, infectious mononucleosis, tuberculosis, brucellosis, schistosomiasis).

Other categories are infiltrative and storage disease (amyloidosis, sarcoidosis, Gaucher disease), and hemolytic anemias (extramedullary hematopoiesis and increased reticuloendothelial workload enlarging both organs).

Left upper quadrant fullness or discomfort (splenic enlargement), right upper quadrant discomfort (hepatic enlargement), and early satiety from splenic mass effect on the stomach. Features of the underlying cause:

• Fever, night sweats, and weight loss suggest infection or lymphoma.
• Lymphadenopathy suggests lymphoproliferative disease.
• Jaundice, ascites, and stigmata of chronic liver disease suggest cirrhosis with congestive splenomegaly.
• Pallor and jaundice suggest hemolysis.
• Travel or exposure history suggests an infectious cause.

Careful abdominal palpation should distinguish the two organs (the spleen has a palpable notch, moves inferomedially with inspiration, and is not ballotable, while the liver edge is generally smoother and continuous with the costal margin). It should also estimate the degree of enlargement, since massive splenomegaly narrows the differential considerably toward chronic myeloid leukemia, myelofibrosis, or visceral leishmaniasis.

Abdominal ultrasound confirms organ size and assesses liver texture, portal vein diameter, and any focal lesions.

FBC with differential and blood film is essential, looking for cytopenias, blasts, atypical lymphocytes, or hemolysis markers.

LFTs and coagulation profile assess hepatic synthetic function. Further workup is directed by the leading clinical suspicion:

• Malaria film or rapid diagnostic test.
• Leishmania serology or bone marrow aspirate in endemic exposure.
• Monospot or EBV serology.
• Viral hepatitis serology.
• Autoimmune and viral screen for cirrhosis workup.
• LDH and haptoglobin for hemolysis.
• Bone marrow aspirate and trephine biopsy with cytogenetics if a hematological malignancy is suspected on blood film or cytopenia pattern.

CT chest, abdomen, and pelvis assesses for lymphadenopathy and staging if lymphoma is suspected.

Differentials are extensive and are detailed individually in the Cirrhosis, Leukemia, Malaria, and Hemolytic conditions entries throughout this atlas, alongside the infectious and infiltrative causes above.

Management addresses the underlying cause identified through the workup above, as detailed in the relevant disease specific entries (Cirrhosis, Leukemia entries, Hodgkin and Non Hodgkin Lymphoma entries, Malaria, Leishmaniasis).

General supportive measures where splenomegaly itself causes significant symptoms or hypersplenism related cytopenia include monitoring for splenic rupture risk with activity modification advice in massive splenomegaly. They also include consideration of splenectomy in refractory hypersplenism or specific hematological indications, weighed against the long-term infection risk from functional asplenia (see Sickle Cell Disease entry for post-splenectomy vaccination and prophylaxis principles, which apply equally here).

Referral: hematology for unexplained hepatosplenomegaly with cytopenia or blood film abnormality; gastroenterology or hepatology if a chronic liver disease process is suspected; infectious disease for suspected visceral leishmaniasis, brucellosis, or other endemic infection.