Hobnail papillary thyroid carcinoma: clinical and sonographic findings of a rare tumour

Thyroid cancer represents one of the most common malignancies worldwide, accounting for 1% of cancer diagnoses. Papillary thyroid carcinoma (PTC) is the most common subtype, representing approximately 80% of thyroid cancer cases. PTCs generally have a good prognosis, with a survival rate of >95% over five years. The reported incidence of PTC has been increasing in recent years, whereas the mortality rate remains stable. This has been attributed to improved methods of detection resulting in increased diagnosis. The reported rates of rarer PTC variants have also increased. Many of these variants are more aggressive and associated with poorer outcomes. The increase in diagnosis is felt to be due to increased awareness and familiarity with the pathological appearances.

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