DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Suturing. Doctor suturing an incision on the abdomen of a patient after the removal of a pigmented naevus, commonly know as mole. Sutures, which can be made of various materials such as catgut or synthetic thread, are applied with a surgical needle (not clearly seen here) held by a tweezer-like instrument. A standard interrupted suturing technique is used here. The needle is passed into one skin edge through the full depth of the wound and out of the other skin edge and then knotted. Most moles are harmless and do not require treatment. In some cases they degenerate into cancerous formations, known as melanomas, and might then require a surgical removal.
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