DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Craniotomy scar. Side view of a 52-year-old man's head showing scarring 10 weeks after craniotomy surgery. The operation was performed to remove a tumour of the brain's supporting cells, a glioblastoma. Craniotomy is removal of part of the skull. Before the operation, all or part of the patient's scalp is shaved. A flap containing the layers of skin and muscle is cut away to reveal the skull beneath. The skull is then cut with a saw so that the tumour can be removed from the brain. The bone and tissues are then replaced and the scalp is sutured (stitched). Here, the stitches have been removed leaving scar tissue and scabs (black) of dried blood.
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