Bilateral papillary thyroid cancer in children: Risk factors and frequency of postoperative diagnosis

Heron Baumgarten1, Carolyn M Jenks2, Amber Isaza3

  • 1Department of Surgery, Pediatric Thyroid Center, Children's Hospital of Philadelphia and Perelman School of Medicine University of Pennsylvania, Philadelphia, PA.

Insights

Nearly 40% of pediatric papillary thyroid cancer (PTC) cases involve bilateral disease, with many occult. Multifocality and lymphadenopathy on ultrasound predict bilateral PTC, supporting total thyroidectomy (TT) for children.

Area of Science:

  • Pediatric Oncology
  • Surgical Oncology
  • Endocrine Surgery

Background:

  • Papillary thyroid cancer (PTC) in children often leads to a recommendation for total thyroidectomy (TT) due to the potential for bilateral disease.
  • This study evaluates the assumption of bilateral disease incidence in a large pediatric cohort.

Purpose of the Study:

  • To assess the prevalence and characteristics of bilateral papillary thyroid cancer (PTC) in pediatric patients.
  • To identify preoperative and ultrasound findings that predict bilateral PTC.
  • To inform surgical decision-making for pediatric PTC.

Main Methods:

  • Retrospective chart review of pediatric patients surgically treated for PTC between 2009 and 2018.
  • Analysis of preoperative risk factors, ultrasound findings, and pathology results.
  • Definition of bilateral disease included pathological PTC in the contralateral lobe, encompassing microscopic disease.

Main Results:

  • 38.4% of pediatric PTC patients had bilateral disease, with 23% diagnosed postoperatively.
  • Multifocal disease on ultrasound (OR 2.9) and nodule size >2 cm (OR 3.5) were associated with bilateral PTC.
  • Bilateral PTC correlated with extrathyroidal extension, lymphovascular invasion, positive lymph nodes, and extranodal extension.

Conclusions:

  • Approximately 38% of children with PTC exhibit bilateral disease, and nearly 25% have occult bilateral involvement.
  • Predictive features for bilateral PTC include multifocality, widely invasive disease on ultrasound, and lymphadenopathy.
  • Total thyroidectomy (TT) remains the appropriate surgical approach for pediatric patients diagnosed with papillary thyroid cancer.
Abstract