Features of papillary thyroid microcarcinoma associated with lateral cervical lymph node metastasis.

Abstract:

OBJECTIVES:Papillary thyroid microcarcinoma (PTMC) has an excellent prognosis with an indolent disease course. However, some PTMCs have an aggressive course with lateral cervical lymph node (LCLN) metastasis or distant metastasis. This study aimed to evaluate the pre-operative features of PTMC associated with LCLN metastasis. DESIGN AND PATIENTS:This retrospective cohort study with a nested, matched case-control design included 199 PTMC patients with LCLN metastasis at initial surgery (N1b group) and 196 PTMC patients without any LN metastasis or persistent disease (N0 NED group) as controls; primary tumour sizes were matched. RESULTS:Compared with the N0 NED group, the N1b group was younger (<50 years) and more likely to be male (P = 0·002 and P = 0·003, respectively). On pre-operative neck ultrasonography (US), N1b group PTMCs were more commonly associated with a location in the upper lobes of the thyroid, or in the subcapsular area and microcalcifications than N0 NED group PTMCs (all P < 0·001). An increase in the number of these features was significantly associated with a higher risk of LCLN metastasis (P < 0·001). Evaluation of the clinical and pre-operative US characteristics of 26 patients with confirmed LCLN recurrence after initial treatment of clinical N0 PTMCs revealed that the distribution of the number of suspicious features in these patients was similar to that of the N1b group. CONCLUSIONS:Papillary thyroid microcarcinomas in young (<50 years) or male patients, with an upper lobe or subcapsular location, and with microcalcification have a higher risk of LCLN metastasis. Individualized management according to the number of these suspicious features may be needed for small thyroid nodules.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Jeon MJ,Chung MS,Kwon H,Kim M,Park S,Baek JH,Song DE,Sung TY,Hong SJ,Kim TY,Kim WB,Shong YK,Lee JH,Kim WG

doi

10.1111/cen.13322

subject

Has Abstract

pub_date

2017-06-01 00:00:00

pages

845-851

issue

6

eissn

0300-0664

issn

1365-2265

journal_volume

86

pub_type

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