&;Auer rods&; are seen in -
Lymphoblast
Myeloblast
Erythroblast
Megakaryoblast
Myeloblast is the earliest recognisable precursor of granulocytes.Myeloblast of AML may show presence of rod like cytoplasmic inclusions called Auer rods which represents abnormal derivatives of primary azurophilic granules. Reference : Harsh Mohan textbook of pathology, 7th edition.Pg no.324
Haematology