A case of metastatic rectal adenocarcinoma diagnosed by thyroid cytology.
Fine-needle aspiration (FNA) cytology of the thyroid gland has been widely used for the evaluation of thyroid nodules. Most of the nodules are primary thyroid lesions. However, up to 4% of thyroid FNA may harbor a metastatic neoplasm. The metastases are most commonly from lung, kidney, breast, and skin. Metastatic colorectal cancers are also seen in thyroid but less common. Here we report the cytologic features, differential diagnosis and clinical implications of a metastatic rectal adenocarcinoma to the thyroid gland diagnosed by FNA.
['Sakaleshpura Mallikarjunappa|Subramanya|S|https://orcid.org/0000-0002-4267-5765', 'Valluru|Neelima|N|', 'Park|Ji-Weon|JW|', 'Gattuso|Paolo|P|', 'Cheng|Lin|L|']
D000230:Adenocarcinoma D044963:Biopsy, Fine-Needle D003581:Cytodiagnosis D003937:Diagnosis, Differential D006801:Humans D008297:Male D008875:Middle Aged D012004:Rectal Neoplasms D013964:Thyroid Neoplasms
rectal adenocarcinoma thyroid cytology metastasis