K

Keloid	The firm, fibrous, connective tissue that emerges and spreads beyond the scar’s natural borders. Significantly more frequent in people with a dark complexion. This may be attempted treated with repeated adrenocortical hormone injections.
Keratoacanthoma	A rapidly growing benign tumor, often seen on the face or hands. Grows in height and has a characteristic keratin depression in the center. Most often spontaneously recovers within months, leaving a scar. Since the element is often difficult to diagnose with certainty in a biopsy, the element is often removed “in toto” anyways.
Knife biopsy	Biopsies excised with a knife. Performed when larger tissue samples are needed, but where the whole element is not cut out, as with an excision biopsy.
Kocher forceps	Surgical pliers with teeth and grooves in the gripping part. This is used to handle hardy tissue such as fascia. Link: https://plastsurgeon.com/surgical-instruments-2/clamps/