Recurrent unilateral periorbital cellulitis: Case report on challenges in differential diagnosis between periorbital cellulitis and idiopathic orbital cellulitis in the absence of inflammatory markersVera Gulácsy1,*, Mohamed Mahdi2,3, Tibor Kalmár4, Marianna Csenki4, Csaba Bereczki4, Hajnalka Szabó 41 Department of Pediatrics, Fejér County Szent György University Teaching Hospital, Székesfehérvár, Hungary.2 Infectology Clinic, University of Debrecen Clinical Center, Debrecen, Hungary.3 Department of Biochemisstry and Molecular Biology, University of Debrececn, Debrecen, Hungary.4 Department of Pediatrics and Pediatric Health Center, Albert Szent-Györgyi Health Centre, University of Szeged, Szeged, Hungary.* Corresponding author VG, email: vpiegl-gulacsy@mail.fmkorhaz.hu