Maxillary mucormycosis masquerading as an endodontic-periodontal lesion.

Endodontic-periodontal (endo-perio) lesions are commonly encountered in dental clinics, with patients typically presenting with acute pulpal pain, often accompanied by abscess formation and tooth mobility. Management generally involves root canal treatment (RCT) and, if required, surgical intervention. This article discusses a notable case of a 43-year-old male patient who presented with a chief complaint of pain and loose teeth in the upper left back region for the past 3 weeks. Phase I periodontal therapy was initiated, followed by RCT of teeth #21 to #25. However, 2 weeks later, the patient presented with swelling, prompting surgical excision and biopsy. Histopathological analysis revealed nonseptate hyphae with right-angle branching, indicative of mucormycosis.