Respiratory Epithelium Lined Cyst of the Maxilla: Differential Diagnosis

Figure 1

Coronal (a) and sagittal (b) CBCT-scan: well-defined hypodense lesion involving a distal and apical region (endo-perio lesion) of the endodontically treated right maxillary first molar. Maxillary and ethmoidal sinusitis and a perforation of the lesion into the right maxillary sinus cavity are also observed.

(a)

(b)