Bilateral Masseter and Internal Pterygoid Muscle Hypertrophy: A Diagnostic Challenge

Area of Science:

• Medical Case Study
• Radiology
• Otolaryngology

Background:

• Bilateral masseter and pterygoid muscle hypertrophy is a rare condition.
• Painless swelling in the parotid or lateral mandible area can have various causes.
• Accurate diagnosis is crucial for appropriate patient management.

Purpose of the Study:

• To present an unusual case of bilateral masseter and pterygoid muscle hypertrophy.
• To emphasize the diagnostic considerations for facial swelling.

Main Methods:

• Case report of a 23-year-old male with a year-long history of bilateral parotid swelling.
• Differential diagnosis included salivary gland, jaw bone, and masseter pathology.
• Magnetic Resonance Imaging (MRI) was used to evaluate the swelling.

Main Results:

• MRI revealed significant bilateral hypertrophy of the masseter and pterygoid muscles.
• Other potential causes of swelling were ruled out.
• The patient's swelling was confirmed to be benign.

Conclusions:

• Bilateral masseter muscle hypertrophy should be considered in the differential diagnosis of unilateral or bilateral parotid or lateral mandibular swelling.
• This condition can mimic other pathologies, necessitating thorough investigation.