Mahmoud Mohamed Elalfy Elhefnawy graduated from Ali mobark High School in Dikerness Dakahlia, Egypt. I graduated in veterinary medical Sciences and had master work at Mansoura university in forensic medicine and toxicology. Mahmoud Elhefnawy received a scholarship for PhD in Fraunhofer institute for toxicology and experimental medicine (2008-2011). This PhD degree emphasized Molecular Biology, Genetics and imaging modalities in liver cancer with cooperation with excellent cluster research of pharmaco-toxicogenomics institute, pathology and radiology institutes of medical school of Hannover Germany. I later complete my research in University of Mansoura University, Egypt and still share in education, research and reviewing of forensic medicine and toxicology specialist on Mansoura University till 24 may 2023. . I have cooperation research with Zigzag University, Alexandria University and also in KSA as Abha University. I share in reviewing and also as editorial board of many journals. Finally I join new position in clinical science department, king faisal university, KSA start from 29 may 2023.