Dr. Hajiannasab is a board-certified pathologist (AP/CP).He graduated with top honors from Azad University faculty of medicine in Iran. He pursued further training in the United States, completing his AP/CP pathology residency at Creighton University and then specialized with a fellowship in oncologic-surgical pathology at Moffitt Cancer Center. He won the first place at Florida Society of Pathologists 2024 for the "Rare and Interesting Case Competition". His area of interest in pathology is diagnosing complex cancer cases of different organs.