Central neurilemmoma (schwannoma) of the mandible. Case report

A Case Report with Current Updates and Immunohistochemistry Features of Intraosseous Schwannoma

Schwannomas are benign peripheral nerve sheath neoplasms that grow slowly and arise from Schwann cells. Here we report a case of an intraosseous schwannoma, with recent updates of molecular characterization and immunohistochemical data, affecting the left mandibular ramus featuring multilocular well-defined radiolucency making it difficult to diagnose.

Gnathic Schwannomas: A Report of Two Cases and Systematic Review of the Literature

BACKGROUND

The intraosseous schwannoma (IS) is a benign peripheral nerve sheath tumor postulated to arise de novo or from nerve fibers in preexisting nutrient canals. ISs are uncommon and comprise less than 1% of neoplasms originating in bone. We herein present two cases of mandibular schwannomas-the first case was a 66-year-old female with a four-month history of pain and pressure associated with an anterior mandibular radiolucency, and the second case was an asymptomatic 12-year-old female with separate radiolucencies of her mandibular symphysis and right posterior mandible. Incisional biopsies of all three lesions showed a benign spindle cell neoplasm with histologic features of a schwannoma; the tumor cells were strongly reactive for S-100. The patients underwent complete enucleation of their lesions and are without evidence of disease at ten months and five years, respectively.

METHODS

A systematic review was undertaken to evaluate the diagnostic features, treatment, and patient outcomes of gnathic schwannomas.

RESULTS

A total of 93 cases were identified with the following demographic findings: predominance in females (57%); average age of occurrence of 37.3 years (8 to 77 years); mean size of 3.6 cm; and involvement of the mandibular body (37.6%), mandibular body and ramus (18.3%), and anterior mandible (18.3%). The predominant clinical sign was swelling (69.9%), and the most common radiographic presentation was a radiolucency (94.6%) with well-defined borders (72%).

CONCLUSION

All cases were treated surgically, with an average follow-up interval of 22.9 months and a recurrence rate of 5.4.

Intraosseous schwannoma of the mandible: a case report and review of the literature

Schwannomas are benign neoplasms originating from the neural sheath and occurring most often in the soft tissues of the head and neck. Intraosseous schwannomas, however, are rare. The most common site of occurrence for these unusual lesions is the mandible. This article documents a case of an intramandibular schwannoma and provides a review of the literature on intraosseous schwannomas, with special attention to cases arising in the mandible and the maxilla.

Central neurilemmoma of maxilla. A case report

Central neurilemmomas in the oral cavity are tumors of rare incidence. A review of related literature is included. A case of central neurilemmoma of the maxilla in a 14-year-old girl, the surgical treatment, and results of a 1-year radiographic follow-up examination are presented.