Pyramidal lobe-dominant papillary thyroid carcinoma - a rare entity with
important clinical implications.
Abstract
Background Papillary thyroid carcinoma (PTC) primarily located in the
pyramidal lobe of the thyroid gland is extremely rare, so the clinical
and pathological features are not well understood. Case The authors
describe a case of multifocal PTC with larger pyramidal lobe tumour, in
a 77-year-old female patient who underwent en bloc total thyroidectomy
with pyramidal lobe, hyoid bone and cervical lymph node excision.
Conclusion In line with the present case, current literature reports a
greater presence of worse prognostic factors, namely extrathyroidal
extension, advanced T stage or presence of cervical lymph node
metastasis. Recently, a new classification has been suggested – Upper
Neck Papillary Thyroid Cancer (UPTC) – which encompasses these
carcinomas, Delphi ganglion metastases and thyroglossal duct cyst
carcinomas, with potential clinical and therapeutic implications,
particularly the need for orthotopic thyroidectomy. Also, the complete
excision of the pyramidal lobe during thyroidectomy may influence the
success of radioactive iodine therapy and the patient’s follow-up
surveillance.