Petechial spots without hepatosplenomegaly in a 5-year-old boy suggest the diagnosis of ITP. About other options Acute leukaemiaAcute leukaemia will give features of involvement of all the three lineages i.e. anaemia (erythrocyte involvement) fever (due to neutrophil involvement) bleeding (due to platelet involvement) Moreover, splenomegaly and lymphadenopathy are usually present in Acute leukaemias.Aplastic anaemiaAplastic anaemia too will present with features, characteristic of involvement of all the three lineages i.e. severe anaemia, fever bleeding.