A Rare Case of Coexisting Medullary and Papillary Thyroid Carcinomas With Parathyroid Adenoma in Pancreatic Neuroendocrine Tumour (pNET)

We present a rare and complex case involving the simultaneous occurrence of medullary thyroid carcinoma (MTC), papillary thyroid carcinoma (PTC), and a parathyroid adenoma in a 79-year-old male. Additionally, incidental radiological findings suggest a pancreatic neuroendocrine tumour (NET). The coexistence of these diverse endocrine disorders is exceptionally uncommon and raises important questions regarding potential syndromic associations. Such cases highlight the necessity for thorough diagnostic evaluation, individualised treatment planning, and the collaboration of a multidisciplinary team, including endocrinologists, oncologists, surgeons, radiologists, and pathologists, to ensure optimal patient outcomes.