Fanconi anaemia is a rare and most common form of inherited aplastic anaemia. It is mostly autosmal (except one x link) recessive disorder characterized by diverse congenital malformations, progressive pancytopenia, and predisposition to both haematological malignancy and solid tumours. Congenital malformation varies from patient to patient and may affect the skeletal system as well as organ systems. Highly variable phenotypic presentation with clinical menifestations makes difficult for diagnosis in some cases. Chromosomal breakage study induce by Mitomycin-C (MMC)/Diepoxybutane(DEB) provide a unique cellular marker for the diagnosis.