Abstract
This case report documents the clinical journey of a 14-year-old female child experiencing bilateral swelling and pain in the mandibular region, suggestive of idiopathic masseter muscle hypertrophy. This condition, although relatively uncommon, can present itself either unilaterally or bilaterally. While cosmetic concerns, often denoted as a "square face," are commonly expressed by patients, additional symptoms like protrusion, bruxism, or trismus may also be present. The patient reported a gradual and asymptomatic bilateral bulging in the mandible angle region, with an explicit complaint of pain. The physical examination revealed bilateral masseter hypertrophy without accompanying local inflammatory changes. Diagnosing this condition necessitates discerning its characteristics, evaluating clinical and radiographic findings, and excluding more severe pathologies like parotid diseases, lymphangioma, and rhabdomyoma. In cases of diagnostic uncertainty, complementary tests are deemed appropriate. Treatment strategies range from conservative measures to surgical interventions. This investigation aims to fulfill its primary objectives by presenting a case study elucidating the intricacies of idiopathic masseter hypertrophy, detailing associated symptoms, and exploring the spectrum of potential treatment options. Through this exploration, we contribute to the evolving understanding and management of this unique condition, especially within the pediatric age group.