Indications and procedure for obtaining a vulval punch biopsy (1175)
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Punch biopsy is considered the primary technique to obtain a diagnostic, full-thickness skin specimen for diagnostic purposes.
It is performed using a circular blade or trephine attached to a pencil-like handle. The instrument is rotated down through the epidermis and dermis, and into the subcutaneous fat. A punch circular blade comes in a range of diameters from 3mm to 8mm. 4mm diameter punches are most often used