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Acta Cytol. 1990 Nov-Dec;34(6):801-4.

Needle tract implantation of papillary carcinoma of the thyroid following aspiration biopsy.

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  • 1Department of Pathology, Eden Hospital Medical Center, Castro Valley, California 94546.


A case is reported of a slow-growing papillary carcinoma of the thyroid that caused clinically apparent implantation along the tract of a fine needle aspiration (FNA) biopsy. This appears to be the first report of a cutaneous needle tract metastasis from a papillary thyroid carcinoma. It represents a highly unusual complication of an FNA biopsy of an indolent, slow-growing tumor.

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