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Radiological Study on the Incidence and Clinical Importance of Os Vesalianum of 5th Metatarsal Bone |
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Muthiah Pitchandi, Mallikarjun Adibatti, V Bhuvaneswari 1. Associate Professor, Department of Radiodiagnosis, ESIC Medical College and PGIMSR, Chennai, Tamil Nadu, India. 2. Assistant Professor, Department of Anatomy, ESIC Medical College and PGIMSR, Chennai, Tamil Nadu, India. 3. Professor and Head, Department of Radiodiagnosis, ESIC Medical College and PGIMSR, Chennai, Tamil Nadu, India. |
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Correspondence Address : Dr. Mallikarjun Adibatti, Department of Anatomy, ESIC Medical College and PGIMSR, Chennai-600078, Tamil Nadu, India. E-mail: na_mallikarjun@rediffmail.com |
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| ABSTRACT |  | ||||||||||||||||||||||||||||||
: Morphometry of body and neural arch of lumbar vertebrae is very crucial in manufacturing screws, interspinous implants as well as preoperative planning of surgeries involving dorsolumbar spine. Aim: To determine various dimensions of typical and atypical lumbar vertebrae. Materials and Methods: A descriptive osteological study was carried out which included 66 intact adult dry human lumbar vertebrae (53 typical and 13 atypical) which were free of any deformity or pathological features. All the 53 typical vertebrae were randomly obtained. The following parameters were measured with slide callipers- superior transverse diameter and superior antero-posterior diameters of vertebral foramen; transverse diameter, antero-posterior diameter and anterior height of vertebral body; width, height of pedicles; interpedicular distance; maximum thickness of lamina; length of transverse process; maximum length, maximum height and maximum central thickness of spinous process. The data was tabulated and analysed using Microsoft Excel software. Mean and standard deviation was calculated for each parameter. Unpaired t-test was applied and p-value was derived for parameters like width and height of pedicles, thickness of lamina and length of transverse process. The p-value<0.05 were considered as significant. Results: The vertebral foramen (superior transverse diameter- 20.41±2.54 mm, superior antero-posterior diameter- 13.3±2.04 mm); vertebral body (transverse diameter- 44.43±5.91 mm, antero-posterior diameter- 30.17±3.19 mm, anterior height- 24.01±1.84 mm); pedicle (width- 10.85±3.94 mm on left side and 11.04±4.01 mm on right side, height- 13.84±4.01 mm on left side and 13.8±1.93 mm on right side, interpedicular distance- 29.17±5.06 mm); lamina (thickness- 6.6±1.36 mm on left side and 6.85±1.34 mm on right side); transverse process (length- 20.94±4.01 mm on left side and 21.51±4.5 mm on right side); spinous process (maximum length- 26.01±3.73 mm, maximum height- 19.92±4.03 mm, maximum central thickness- 6.42±1.41 mm). The mean transverse diameter and antero-posterior diameter of vertebral foramen of atypical lumbar vertebrae were higher than those of the typical lumbar vertebrae and these differences were significant (p-value of 0.0001 for transverse diameter and p-value of 0.005 for antero-posterior diameter). Conclusion: Most of the parameters of atypical lumbar vertebrae were found to be more compared to those of typical lumbar vertebrae. This inference should be kept in mind during fixation of lumbar inter-spinous implants, designing of pedicular screws and spinal grafting. | |||||||||||||||||||||||||||||||
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| Keywords : Accessory ossicle, Lateral foot pain, Peroneus brevis tendonitis | |||||||||||||||||||||||||||||||
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| INTRODUCTION |
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Accessory ossicles of foot are the most common skeletal variations of the foot and ankle. They usually arise commonly from unfused accessory ossification centers, and may appear to be normal subdivisions of ordinary bones or nearby additional free elements. Most common accessory bones of the foot are the Os trigonum, Os navicular, while the less frequent ones include Os vesalianum, Os sustentaculi, Os supranaviculare, Os calcaneus secundarius, Os subtibiale and Os subfibulare (1),(2),(3),(4). OSV is a rare accessory bone located at proximal part of the base of fifth metatarsal bone. OSV is present within the peroneus brevis tendon with a reported incidence of 0.1% to 5.9% (2),(5),(6). It is rarely symptomatic, has characteristics typical of an accessory bone, like rounded shape and smooth edges with presence of a welldeveloped fifth metatarsal tuberosity. Plantar lateral foot pain can occur due to ossifying apophysis/ apophysitis of the fifth metatarsal base fracture of the tuberosity of the fifth metatarsal, non-union of a tuberosity fracture of the fifth metatarsal, un-united apophysis of the fifth metatarsal base (5). However, symptomatic OSV is often neglected due to lack of awareness and knowledge pertaining to it. Hence, the retrospective radiographic study on OSV was taken up in our institute, to observe for the presence, incidence, location and distribution of OSV. OSV is been reported for its rarity and clinical importance. | |||||||||||||||||||||||||||||||
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| TABLES AND FIGURES |
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Original article / research
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