René Mathiasen

René Mathiasen serves as a Clinical Associate Professor in the Department of Clinical Medicine at the University of Copenhagen, specializing in Paediatrics with clinical affiliation to the Capital Region of Denmark (Region Hovedstaden). His work integrates pediatric oncology, neurology, and ophthalmology through hospital-based research at Blegdamsvej addresses in Copenhagen.

His research focuses on critical diagnostic challenges in childhood cancers, particularly brain tumors and acute myeloid leukemia. Key interests include ophthalmological tumor signs, diagnostic intervals, pandemic impacts on referral systems, and neurocognitive outcomes post-tumor resection. He employs nationwide Danish cohort methodologies and cross-linguistic European collaborations to address misdiagnosis patterns and treatment complications.

Mathiasen actively contributes to Nordic pediatric oncology initiatives including the CMS study group and Nordic Society of Paediatric Haematology and Oncology. His recent work demonstrates strong translational focus—from melatonin secretion studies to advanced PET imaging techniques—while leveraging Denmark's comprehensive health registries for population-level analysis.