Trephinated skull found in the River Thames, note brow ridges
Well-preserved skull of Gadevang Man, a prehistoric 'bog body', dated 480-60 BC, found in Denmark. The skull shows signs of a surgical trephination procedure
Mesoamerica - skull showing several trephinated holes.
FWIW it's my opinion what you see is the result of the removal of CUTANEOUS HORNS:
Cutaneous horns are a mysterious medical condition but they may be caused by radiation exposure since they occur more in sunlight exposed areas (face, hands). They could arise from burn scars and some have reported an association with a common disease known as human papillomavirus (HPV). Probably the largest cutaneous horn was the one that was on Madame Dimanche, a French woman from the 19th century whose forehead horn measured 9.8 inches (24.9 cm). It was successfully removed via surgery
