Masseter and medial pterygoid muscle hypertrophy

Area of Science:

• * Anatomy and Physiology
• * Medical Imaging
• * Surgical Pathology

Background:

• * Hypertrophy is defined as an increase in cell size, not number, leading to tissue enlargement.
• * Generalized masticatory muscle hypertrophy can affect various muscles, including the temporalis, masseters, and medial pterygoids.
• * Masseteric hypertrophy often presents as painless swelling near the mandibular angle, posing a diagnostic challenge.

Observation:

• * Clinical presentation of masseteric hypertrophy can mimic parotid or dental conditions.
• * Differentiating benign hypertrophy from rare malignant muscle lesions solely on clinical examination is difficult.
• * A unique case involved combined masseter and medial pterygoid muscle hypertrophy.

Findings:

• * Clinical assessment alone failed to identify the extent of muscle hypertrophy.
• * Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) were essential for confirming the diagnosis.
• * The study highlights the diagnostic limitations of clinical examination in specific hypertrophy cases.

Implications:

• * Advanced imaging (CT/MRI) is vital for diagnosing complex masticatory muscle hypertrophy.
• * Accurate diagnosis prevents misidentification with other pathologies, ensuring appropriate patient management.
• * This case underscores the importance of advanced imaging in identifying rare anatomical variations and conditions.