Information on the skin biopsy

Biopsy techniques

The Spindle biopsy

Larger biopsies are generally performed by using the spindle-shape excision with the scalpel. Where possible, the direction of the excision should follow the tension-lines of the relaxed skin. The width of the excision should be not more than a third of its length, and the angle of both cuts to the poles of the spindle should not be more than 30º, in order to prevent too much tension when closing up the wound. The scalpel should be kept upright and inserted into the fatty tissue. Only in very hirsute areas is it advisable to tilt the scalpel in such a way that the incision follows the course of the hair follicle. (10,14) If incisions are directed inside at an oblique angle, the tissue is removed too superficially, and thus not infrequently lacks the diagnostically-critical changes to the lower dermis and sub-cutis. The stitching technique is contingent upon the body region and blemish size.(8,14 ) A dehiscence of the biopsy scar cannot always be prevented, especially on the trunk.

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