I think you are due an immediate explanation of why you weren't told in an appropriate and timely manner so you had an opportunity to discuss the implications with your specialist.
While a positive result is worrying, please be aware that 85% of thyCa diagnosis is for papillary cancers which are very slow growing. If you're under 40 years and the nodule is <2cm the recommendation may be active watch & wait rather than surgery.
Ultrasound scans have become so sophisticated that tiny tumours <2mm are now detected. FNA needs to catch up to determine whether tumours are benign or not, and if not, to identify papillary, follicular and variants.
I had Hurthle cell carcinoma, an aggressive follicular variant, which wasn't identified until the lobe was biopsied. Completion thyroidectomy followed 3 months later and that lobe was free of cancer.
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