Low hemoglobin, elevated retic count, spherocytes on peripheral smear
Elevated MCHC (RBC membrane leaky causing RBC dehydration)
Osmotic fragility test, AGLT, EMA binding test, cryohemolysis
One study showed AGLT + EMA binding test identified all<unk>  patients
Negative Coombs test
One study showed AGLT + EMA binding test identified all<unk>  patients
Hereditary spherocytosis
Disseminated Intravascular Coagulation 
Paroxysmal nocturnal hemoglobinuria
Thrombotic Thrombocytopenic Purpura 
Myelophthistic anemia
Hemolytic Uremic Syndrome 
Thalassemia
HELLP syndrome