True inca bone with unilateral epipteric bone - a rare case report

The squamous part of the occipital bone consists of an upper membranous (interparietal) part and a lower cartilaginous (supraoccipital) part and in rare cases the membranous part may be separated from the supraoccipital part by a suture. It is then called as the interparietal or inca bone. We reported a rare case of true inca bone with unilateral epipteric bone and many wormian bones in a human skull. There is also presence of bilateral squamatization of coronal suture in the distal part. Knowledge of inca bone and wormian bone is important for the neurosurgeons orthopedic surgeons, anthropologists, radiologists and forensic experts.