A Rare Prevertebral Ordinary Lipoma Presenting as Obstructive Sleep Apnea Computed Tomographic and Magnetic Resonance Imaging Findings

摘要

Lipomas are generally encapsulated subcutaneous or submucosal masses that primarily arise in the superficial soft tissues. As such, they are referred to as ordinary lipomas.1 There is also an infiltrating or intramuscular type of lipoma that infiltrates surrounding skeletal muscles and tissues, has an incomplete capsule, and has a high rate of recurrence after resection.2 Only 13% to 15% of lipomas present in the head and neck, with the posterior triangle of the neck being the most common affected site. However, the anterior neck, infratemporal fossa, oral cavity, pharynx, and larynx also may be involved.3 Lipomas posterior to the pharynx are uncommon, with only about 30 cases described since the late 1800s.