title: Patterns of cervical lymph node metastases in primary and recurrent papillary thyroid cancer.
abstract: The incidence of thyroid cancer is rising in the United States with papillary thyroid cancer (PTC) being the most common type. We performed a retrospective study of 49 patients with PTC who underwent 57 lateral neck dissections (NDs). The extent of NDs varied, but 29 of 57 (51%) consisted of levels II-V. Twelve of 57 (21%) NDs consisted of levels I-V. Twelve of 57 (21%) NDs consisted of levels II-IV. One of 57 (1.8%) necks involved only levels I-IV. One of 57(1.8%) necks involved only levels I-V. One of 57(1.8%) necks involved only levels III-V. Two (3.5%) double-level (III-IV) neck surgeries were also performed. Metastatic PTC adenopathy was confirmed pathologically in 2%-level-I, 45%-level-II, 57%-level-III, 60%-level-IV, and 22%-level-V necks. Level-V was positive in 21% of primary and 24% of recurrent groups (P = 0.76). Comparing primary and recurrent disease, there was no difference in nodal distribution or frequency for levels I, II, III, and V. Level-IV was more common in the recurrent cases (P = 0.05). Based on the pathologic distribution of nodes, dissection should routinely include levels II-IV and extend to level-V in primary and recurrent cases. Our data does not suggest routine dissection of level-I.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Georgetown University Hospital, Washington, DC 20007, USA.
authors.forename: Neda
authors.initials: N
authors.lastname: Ahmadi
authors.forename: Ameet
authors.initials: A
authors.lastname: Grewal
authors.forename: Bruce J
authors.initials: BJ
authors.lastname: Davidson