Type of Article:  Original Research

Volume 8; Issue 4.2 (December 2020)

Page No.: 7814-7816

DOI: https://dx.doi.org/10.16965/ijar.2020.228


Asharani S K.

Associate Professor, Department of Anatomy, Adichunchanagiri Institute of Medical Sciences, B G Nagara, Karnataka, India.

Address for correspondence: Dr. Asharani S K, Associate Professor, Department of Anatomy, Adichunchanagiri Institute of Medical Sciences, B G Nagar, Nagamangala (taluk), Mandya (district) – 571448, Mobile no – 9480304208 E-Mail: ashakshetty@gmail.com            


Background: Sutural or wormian bones are islands of bone that are commonly found in the sutures of the skull mainly along the lambdoid suture. These sutural bones which are irregular in size, shape and number may arise from separate centres of ossification. The prior knowledge about the Wormian bones is important because they are present in normal individuals as well as in various disorders such as osteogenesis imperfect, rickets, etc.

Aim: To study the occurrence of wormian bones in adult dry skulls

Materials and Methods: The present study was carried out on 95 adult dry human skulls in the department of Anatomy, Adichunchanagiri Institute of Medical Sciences, B G Nagara. Skulls with fractures and deformities were excluded from the study. Intact skulls were cleaned thoroughly and observed for the presence of wormian bones along the sutures of skull.

Results: Out of 95 skull bones studied, 24 (25.26%) skulls showed the presence of wormian bones. We also observed that maximum number of such bones (single or multiple) were present along the lambdoid suture followed by lambda, asterion, sagittal suture & coronal suture. A very small wormian bone was also found near the bregma of the skull.

Conclusion: The awareness about the occurrence of wormian bones and their topographical distribution will guide the clinicians mainly neurosurgeons in their practice. These bones mimic fracture lines in radiograph; therefore radiologists must also be aware of this normal variation.

Key words: Wormian bone, Lambdoid suture, skull.

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Cite this article: Asharani S K. A STUDY ON THE OCCURRENCE OF WORMIAN BONES IN ADULT DRY SKULLS. Int J Anat Res 2020;8(4.2):7814-7816. DOI: 10.16965/ijar.2020.228