The rising incidence of papillary thyroid microcarcinoma and is completion surgery necessary or not?

Oğuz Kuşcu1, Övsen Önay2, Bahar Kayahan2

  • 1Hacettepe University Faculty of Medicine Department of Otorhinolaryngology.

Insights

The incidence of papillary thyroid microcarcinoma (PTMC) is rising due to increased awareness. Completion surgery is often unnecessary for PTMC, especially incidental cases, with no recurrence observed after hemithyroidectomy.

Area of Science:

  • Endocrinology
  • Oncology
  • Surgical Pathology

Background:

  • The incidence of thyroid cancer has notably increased over the past three decades.
  • Papillary thyroid microcarcinoma (PTMC), defined as papillary cancer ≤1 cm, is a significant contributor to this rise.
  • Evaluating the rising PTMC incidence and the adequacy of hemithyroidectomy is crucial for patient management.

Purpose of the Study:

  • To investigate the increasing incidence of papillary thyroid microcarcinoma (PTMC).
  • To determine if hemithyroidectomy (lobectomy) is a sufficient surgical treatment for PTMC.
  • To assess the necessity of completion surgery for PTMC cases.

Main Methods:

  • Retrospective analysis of 462 patients who underwent thyroidectomy (hemithyroidectomy or total thyroidectomy) between 2000 and 2015.
  • Inclusion of surgical procedure details, histopathology, complications, follow-up, and mortality data.
  • Utilized ultrasound (USG) and fine-needle aspiration cytology (FNAC) for all cases.

Main Results:

  • A significant increase in PTMC incidence was observed, rising from 44.6% in 2000-2007 to 74.4% in 2008-2015 (p<0.001).
  • Of 22 PTMC patients requiring completion surgery, 40 were managed with hemithyroidectomy alone.
  • No recurrence was reported in any PTMC patient, regardless of surgical approach.

Conclusions:

  • The rising incidence of PTMC is attributed to increased pathological and radiological detection and awareness.
  • Completion surgery is not universally necessary for all PTMC cases, particularly incidental findings.
  • Hemithyroidectomy appears to be an adequate treatment for select PTMC cases, with no observed recurrence.

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