Nasolacrimal duct obstruction and dacryocystocele associated with a concha bullosa mucocele

Purpose To describe the rare occurrence of a concha bullosa mucocele producing secondary nasolacrimal duct obstruction and dacryocystocele. Design Case report. Participant Forty-two-year-old man with 6-month history of left medial canthal mass. Intervention Clinical evaluation with lacrimal testing, computed tomography and surgical exploration, including biopsy, dacryocystorhinostomy, and excision/marsupialization of the middle turbinate concha bullosa mucocele were performed. Results The medial canthal mass was confirmed to be a dacryocystocele associated with nasolacrimal duct obstruction and bone destruction caused by concha bullosa mucocele. Conclusions Concha bullosa mucoceles are uncommon and even more rarely can produce secondary nasolacrimal duct obstruction and dacryocystocele formation. The clinical and radiologic features may mimic a lacrimal sac malignancy.