Babikir Ishag Mohamed Fadul3, Marwa Salah Abdalla Abdelmageed1, Esam Mohamed Abdulraheem2,, 1Department of Histopathology and Cytology, Neelain University, Khartoum, Sudan. E. mail: marwaf_2014@hotmail.com 2Department of Medical Laboratories, College of Applied Medical Science, Shaqra University, Saudi Arabia. E. mail: esamcytomed@yahoo.com 3National Health Laboratory, Ministry of Health, Khartoum, Sudan. E. mail: babikirf@gmail.com, Sudan