Comprehensive surgical reconstruction of Tessier number 7 congenital craniofacial cleft. A rare case report

Introduction and importance Tessier 7 craniofacial congenital cleft is a rare anomaly, occurring in about 1 in 80,000 to 1 in 300,000 live births, comprising 0.3% to 1.0% of total cleft cases. A total of 24 cases have been reported since 2000. This case is the 25th instance and possibly the first reported in Nepal. Presentation of the case: A 3-year-old child, accompanied by parents, presented at the Department of Oral and Maxillofacial Surgery with complaints of feeding difficulties, speech impediment, and aesthetic concerns. Diagnosis revealed Tessier number 7 congenital cleft. Surgical intervention successfully repaired the cleft, involving straight-line closure of mucosa and skin, suturing of perioral muscles to establish a new modiolus and formation of a new commissure. Postoperative follow-up over 6 months demonstrated excellent functional and aesthetic results without any complications. Clinical discussion: Tessier 7 congenital cleft arises from anomalous fetal development, stemming from incomplete fusion of the maxillary and mandibular processes of the first pharyngeal arch. Surgical correction poses challenges due to atypical anatomical positioning and cleft appearance. The repair involves layered closure, linear mucosal closure, perioral muscle reorganization to establish a new modiolus, skin closure via straight-line or zplasty techniques, culminating in the creation of a new commissure. Conclusion: Given its rarity, surgeons must be well-versed in the intricate surgical protocol for Tessier 7 cleft treatment. Early intervention is crucial for optimal functional and cosmetic results. Key steps encompass establishing a new modiolus, forming a new commissure, and achieving effective skin closure.