Merck Manual

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Fine-needle aspiration of a skin mass
Fine-needle aspiration of a skin mass

    Clinical photograph displaying fine-needle aspiration (FNA) technique. A sterile needle is connected to a syringe and introduced into the mass with continuous or intermittent suction. In another technique, the needle is not attached to a syringe but is stabbed into the mass and redirected several times to collect cells into the needle bore.

Courtesy of Dr. Alice Villalobos.