PATHOLOGIC QUIZ CASE 1
John R. Kuhn, MD, Oklahoma City
A 20-year-old man was initially seen with a one-year history of recurrent swelling on the right side of his neck. The swelling had not changed in size for five months prior to manifestation.Physical examination disclosed an 8 × 4-cm cystic mass extending medial and along the contour of the sternocleidomastoid muscle. The superior aspect of the mass was just below the mastoid process and the inferior border was 5 cm above the clavicle. The mass was slightly tender to palpation and had no pulsatile movement; no bruit was heard over the mass. The rest of the physical examination findings were normal.The patient was taken to surgery for an incisional biopsy. At surgery, a blue, multiloculated, cystic mass was identified medial to the sternocleidomastoid muscle. It was encapsulated and not adherent to adjacent tissues. A frozen section was