Medicolegal importance of inca bone in forensic.

ABSTRACT

Skull is usually available human bone for establishing personal identity. Presence of Inca bone in human skull is one such feature that may be identified on radiological examination and if earlier recorded help in establishing the identity of deceased. Complete division of membranous and cartilaginous part of occipital bone by a transverse suture extending between the two lambdoid sutures at the level of highest nuchal line above the external occipital protuberance, results in rare cranial variation presenting as Inca bone.During medicolegal examination of one male skull at Madhya Pradesh Medicolegal Institute Bhopal, presence of Inca bone was found. The interparietal bone is formed by a part of the squamous occipital bone bounded by two lambdoid sutures on two sides and additional longitudinal suture on both sides between lambdoid suture and external occipital protuberance forming diamond shaped Os Incae Centrale that can also be considered as intra-occipital bone. Such rare findings have significant anthropological and embryological basis. Specific anatomical feature if earlier documented in the clinico-radio-pathological reports of the deceased provides opportunity for establishing the identity.