BACKGROUND: This retrospective study aims to evaluate the relative representation of individual types of developmental odontogenic cysts (DOCs), especially from the perspective of syndromic and non-syndromic multiple DOCs in the Czech population. In addition, we also summarize the previous studies on the occurrence of multiple DOCs and provide a literature review of case reports and case series on non-syndromic multiple DOCs, particularly dentigerous cysts (DCs) and odontogenic keratocysts (OKCs). METHODS: The study included histologically confirmed DOCs retrieved between January 1, 2012, and August 8, 2023, at the Clinic of Maxillofacial Surgery, University Hospital Brno, Czech Republic. All specimens were re-classified according to the fifth edition of the World Health Organization Classification of Head and Neck Tumors, 2022. Patients with an uncertain histological diagnosis were excluded from the study. RESULTS: Of a total of 377 patients, 286 had DCs, 85 OKCs, 5 orthokeratinizing odontogenic cysts (OOCs), 1 botryoid cyst, and 1 calcifying odontogenic cyst. The proportion of patients with multiple DCs in our study (6.6%) was higher than usually reported in the literature. The study also found that 100% of patients with multiple DCs did not exhibit any syndromic associations. On the other hand, 66% of multiple OKCs were associated with the Naevoid Basal Cell Carcinoma Syndrome (NBCCS) and the proportion of OKC patients with NBCCS (7%) was relatively higher than in other studies. Recurrence of OKCs was also significantly associated with NBCCS (p < 0.05). Only one patient presented with bilateral OOCs, without any association with a syndrome. CONCLUSION: Multiple OKCs are more likely to develop in syndromic patients, while none of the multiple DCs were associated with a syndrome. The incidence of multiple OOCs and other DOCs is extremely rare. Still, we conclude that patients with multiple DOCs should be carefully considered for examination by other specialists to rule out possible syndromic involvement.

Clinic of Maxillofacial Surgery Faculty of Medicine Masaryk University Kamenice 5 Brno Czech Republic

Clinic of Maxillofacial Surgery University Hospital Brno Jihlavska 20 Brno Czech Republic

Clinic of Stomatology Faculty od Medicine Masaryk University Pekarska 664 53 Brno 6250 00 Czech Republic

Department of Pathology Faculty of Medicine Masaryk University Kamenice 5 Brno Czech Republic

Department of Pathology University Hospital Brno Jihlavska 20 Brno Czech Republic

RECETOX Faculty of Science Masaryk University Kotlarska 2 Brno Czech Republic

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