Maxillary orthokeratinized odontogenic cyst remains a rare finding

A new systematic review and case report in the Journal of Clinical and Experimental Dentistry highlights just how unusual orthokeratinized odontogenic cysts, or OOCs, are in the maxilla. OOC is a rare developmental jaw cyst that’s typically seen in the posterior mandible, more often in men in their 30s and 40s. Earlier literature has already shown a clear mandibular predominance, with OOCs affecting the mandible about 2.5 times as often as the maxilla, and recurrence appearing uncommon compared with odontogenic keratocysts. The new paper adds another maxillary case to a small published pool and reinforces that maxillary presentation remains an outlier clinicians can miss if they assume these lesions are largely mandibular. (pmc.ncbi.nlm.nih.gov)

Why it matters: For veterinary professionals, the paper is a reminder that uncommon cystic lesions can present outside their expected anatomic pattern, and that location alone shouldn’t narrow the differential too quickly. Although this report is from human oral pathology, the broader clinical lesson is familiar across veterinary dentistry and maxillofacial practice: definitive diagnosis depends on histopathology, especially when lesions resemble dentigerous cysts or odontogenic keratocysts on imaging. That distinction matters because OOC is recognized as a separate entity with different biological behavior, including a lower reported recurrence risk than odontogenic keratocyst. (pmc.ncbi.nlm.nih.gov)

What to watch: Watch for whether future case series better define how often maxillary OOC occurs, how often it is initially misclassified, and whether follow-up data continue to support its relatively low recurrence rate. (pmc.ncbi.nlm.nih.gov)