Unusual Presentations of Intramuscular Lipoma: A Case Series

Intramuscular lipomas (IMLs) are rare benign tumors that arise when lipomas infiltrate muscle tissue. These tumors are most commonly found in the large muscles of the limbs and trunk, particularly in the thigh, shoulder, and upper arm. IMLs often present as painless masses but can cause pain, muscle dysfunction, and neurological deficits as they grow and invade surrounding structures. This case series discusses three patients with IMLs located in uncommon sites: the wrist, foot, and trapezius muscle. Diagnostic imaging, including ultrasound and magnetic resonance imaging (MRI), was essential in identifying and characterizing these lesions. Surgical excision is the treatment of choice, though the infiltrative nature of IMLs increases the risk of recurrence. This series underscores the importance of early diagnosis and appropriate management of IMLs, particularly in rare anatomical locations.