Splenomegaly
Infectious mononucleosis, CMV, acute HIV
Endocarditis
Histoplasmosis, malaria, leishmaniasis, filariasis, kalazar
Chronic hemoytic anemia
Leukemia, lymphoma, myelofibrosis (extramedullary hematopoiesis)
Essential thrombocytosis, PCV
Cirrhosis of non-cirrhotic portal HTN
CHF
ITP, splenic vein thrombosis
Splenic cysts, hemangioma
RA (Felty's syndrome)
SLE, sarcoidosis
Wilson's disease
Hamartomas
Amyloidosis
Budd-Chiari syndrome
Gaucher's dz
Niemann-Pick's dz
Metastatic - melanoma
Eosinophilic granuloma (Langerhan's cell histiocytosis, histiocytosis X)