The incidence of sesamoid bone was statistically different between the two counting methods for the MP joints of index and little finger and thumb interphalangeal joint ( P < 0.005). There was a rare incidence in the MP joints of middle and ring finger (0.7%). The sesamoid of the index finger MP joint and thumb interphalangeal joint was observed in 44% and 42.4%, respectively. MP joint of the little finger was the second most prevalent location (62.8%). Sesamoids of metacarpo-phalangeal (MP) joint of the thumb were always present on both radial and ulnar sides, except for 9-cases (2.1%) where they were not present on radial side and 6-cases (1.5%) where they were not present on ulnar side. Statistical analysis between the CT and radiograph results was performed. 3D-CT images were analyzed by one observer and parts of hands (411-hands) were evaluated with radiograph to compare with CT results. Sesamoid bones were examined in 427-CT images. The purpose was to provide an accurate incidence of sesamoid bones using 3D-CT. Since counting with radiographs might be inaccurate due to superimposition of adjacent digits, we tried to overcome this obstacle using 3D-reconstructed CT in Korean patients. The prevalence of sesamoid bone in hand is known to be variable among populations of various geographic origins. Radiology also plays an important role in the diagnosis and work-up of bone lesions in the hand including enchondromas, osteoid osteomas and chondrosarcomas. The hands are a common location for degenerate and inflammatory arthropathies which all have hallmark radiological features. Rolondo or Bennett's fracture) whereas ultrasound and MR are better at evaluating soft tissue injury (e.g. Plain radiography and CT are excellent at evaluating bony injury (e.g.
Trauma of the hand is extremely common and radiology plays an important role in the diagnosis of treatable injuries including fractures, dislocations and ligament tears. In this article we explain the anatomy and highlight pathology of the hand from a radiological perspective with respect to plain film, CT, ultrasound and MR imaging. The biomechanics and anatomy of the human hand is extremely complex, and a good understanding is required to diagnose pathology.
This is an overview of radiological imaging of the hand highlighting the various imaging modalities used in the work-up and diagnosis of a range of orthopaedic and rheumatological disorders.
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