A unique presentation of parietal notch bone with coexisting multiple wormian bones and complete metopism
During routine osteology tutorials for the first year medical students, we came across this skull which presented with various noteworthy findings. In total, 13 sutural bones were observed in the skull, out of which 11 were located at the commonly described lambda. Out of these 11, five were seen on the right side and six were present on the left side. One sutural bone (coronal ossicle) was seen 3.5 cm above the pterion, on the left side of the coronal suture. But, a very rare sutural bone- the parietal notch bone was observed at the posterior aspect of the temporo-parietal suture. This bone was present between the squamous & mastoid parts of the temporal bone and the parietal bone. It was situated 2 cm anterior to the asterion. Another interesting co- finding on the same skull was the presence of a complete metopic suture, which extended from the bregma to the nasion. It was a typical dentate suture. The report bestows an important anatomical insight into the region and has potential relevance for the radiologists and the surgical interventionists working on the area.
Jeanty P, Silva SR, Turner C. Prenatal diagnosis of wormian bones. J Ultrasound Med.2000; 19:863-869
Das S, Suri R, Kapur V. Anatomical observations on os inca and associated cranial deformities. Folia Morphol.2005; 64(2): 118-121
Bilodi AK, Agrawal BK, Mane S, Kumar A. A study of metopic sutures in human skulls. Kathmandu Univ Med J.2003; 2(2):96-99
Ajmani ML, Mittal RK, Jain SP. Incidence of the metopic suture in adult Nigerian skulls. J Anat.1983; 137:177-183
Das AC, Saxena RC, Beg MAQ. Incidence of metopic sutures in UP subjects. J Anat Soc India.1973; 22(3): 140-143
Berry AC, Berry RJ.Epigenetic variation in the human cranium.J Anat.1967; 101(2): 361-379
Standring S. Gray’s Anatomy.40th ed. Churchill Livingstone.2008; p 418
Wilczak CA, Ousley SD. Test of the relationship between sutural ossicles and cultural cranial deformation: results from Hawikuh, New Mexico. Am J Phys Anthropol.2009; 139: 483-493
O’Loughlin VD. Effects of different kinds of cranial deformation on the incidence of wormian bones. Am J Phys Anthropol.2004; 123:146-155
Hanihara T, Ishida H. Frequency variations of discrete cranial traits in major human
populations. I. Supernumerary ossicle variations. J Anat.2001; 198(6):689-706
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