Want to take quizzes and track your credits?
A woman in her 30s presented with a 1-year medical history of a painless, slowly enlarging, midline neck mass without associated dysphagia, odynophagia, weight loss, or history of infection. The mass was soft, mobile, and compressible in midline level IA, measuring 7 cm and posterior-superiorly displacing the tongue. The mass was visible as a clear blue lesion in the floor of the mouth and was nontender. Computed tomographic (CT) scan of the neck with IV contrast was performed (Figure). The patient was taken to the operating room for a successful combined intraoral and transcervical approach to excision.
Please finish quiz first before checking answer.
Read the answer below and download your certificate.
Read the discussion below and retake the quiz.
B. Epidermoid cyst
Epidermoid cysts (ECs) are classically small, benign, cystic masses with 32% of lesions occurring in the head and neck.1 They usually arise because of failure of primitive epithelial cells to separate from underlying deep tissue during branchial arch formation.2 True ECs are fluid-filled lesions lined by simple squamous epithelium and a layer of keratin. They have been referred to by other terms such as epidermal cysts, epidermal inclusion cysts, sebaceous cysts, and seborrheic cysts. However, the terms “seborrheic cysts” and “sebaceous cysts” are misnomers, not synonymous with epidermoid cysts. Epidermoid cysts are normally close to the skin and can be located anywhere on the face, scalp, and neck. However, in the deep tissue planes, ECs in the head and neck make up only 1.6% to 6.9% of cases in the entire body.3
Sign in to take quiz and track your certificates
JN Learning™ is the home for CME and MOC from the JAMA Network. Search by specialty or US state and earn AMA PRA Category 1 CME Credit™ from articles, audio, Clinical Challenges and more. Learn more about CME/MOC
Corresponding Author: Nicholas Rossi, BA, University of Texas Medical Branch, School of Medicine, 301 University Blvd, Galveston, TX 77550 (email@example.com).
Published Online: April 11, 2019. doi:10.1001/jamaoto.2019.0320
Conflict of Interest Disclosures: None reported.
Additional Contributions: We thank the patient for granting permission to publish this information.
You currently have no searches saved.