It is difficult to correctly diagnose<unk>  neoplasms (FNs) on fine-needle aspiration cytology (FNAC) because it shares many cytological features with other mimicking lesions. Classification It is impossible to distinguish between<unk>  adenoma and carcinoma on cytological grounds. If fine needle aspiration cytology (FNAC) suggests<unk>  neoplasm, thyroid lobectomy should be performed to establish the histopathological diagnosis. Features sine qua non for the diagnosis of<unk>  carcinoma are capsular invasion and vascular invasion by tumor cells. Still, focuses of the capsular invasion should be carefully evaluated and discriminated from the capsular rupture due to FNA penetration resulting in WHAFFT (worrisome histologic alterations following FNA of thyroid). *<unk>  carcinoma tends to metastasize to lung and bone via the bloodstream. * Papillary thyroid carcinoma commonly metastasizes to cervical lymph nodes. HMGA2 has been proposed as a marker to identify malignant tumors.
Follicular thyroid cancer
Papillary thyroid cancer
Thyroid lymphoma
Medullary thyroid cancer
Anaplastic thyroid cancer
Thyroid adenoma
Radiation-induced thyroiditis
Poorly differentiated thyroid cancer