[Excision for congenital nasal dermoid and sinus cyst in children].

To explore the surgical effect and experience of endoscope-assisted excision for congenital nasal dermoid and sinus cyst (NDSC) in children. Fifty-three patients with congenital NDSC treated in Beijing Children's Hospital from January 2007 to December 2018 were retrospectively reviewed, including 30 boys and 23 girls, with the age ranging from 9 to 145 months (mean age 35.6 months). The ultra-low-dose CT scan and MRI of the paranasal sinuses were performed for all patients. Excisions of NDSC under general anesthesia were performed for all patients, and surgical approaches were dependent on location and extent of the lesions according to radiographic workups. All intra-osseous patients and complicated superficial cases underwent surgical excision of NDSC and nasal reconstruction with the assistance of endoscope. Initial presentation, medical history, imaging workups, surgical approaches, complications, rates of recurrence and cosmetic outcomes were evaluated. Descriptive statistics was used for the results analysis. Among 53 cases, the most common presentation included a nasal-glabella mass (21, 39.6%), a dorsal punctum (13, 24.5%) and a dorsal mass (9, 17.0%). The sites of NDSC included nasal glabella (22, 41.5%), nasal bridge (27, 50.9%) and nasal tip (4, 7.5%). Of all patients, 24 cases (45.3%) had superficial lesions, 19 cases (35.8%) had intraosseous extension into the frontonasal bones, 10 cases (18.9%) extended intracranially but remained extradural. Surgical approaches included transverse incision (22, 41.5%), minimal midline vertical incision (27, 50.9%) and external rhinoplasty (4, 7.5%). All NDSC were successfully excised and no nasal reconstruction needed. All cases were followed up from 9 to 151 months with a mean of 67.3 months. Five patients (9.4%) with recurrence were observed and were managed successfully with reoperation. During the follow-up, no nasal deformity was noted, and cosmetic outcome was favorable for all patients. Endoscope-assisted excision has the advantage of clear vision, small trama and low recurrence rate for children with NDSC.