Name : Maryam
Resident : ----------------
Gender : Male
Age : 20
A 20-year-old man with left wrist pain after a fall on his hand.
Imaging Procedures and Findings
A 20-year-old man after a fall on his hand underwent MRI, showed hypointense fracture line especially on axial T1w images also bone marrow edema of hook & body of hamate (hypointense on T1w & hyperintense on fat suppressed PD sequences). No significant displacement is noted. Lucent fracture line with no significant displacement is also depicted by CT scan.
1.5% of carpal fractures is related to hamate bone (hook, distal part, proximal pole & osteochondralfractures of triquetral articular surface). Hook fracture may be related to fall on outstretched wrist (dorsiflexion), tension or direct trauma. In playing sport patients, dominant hand & nondominant hand in other causes. The best diagnostic tools are MR & CT. The best diagnostic clue is Fracture line in hamate on direct axial images.
Hamulus (hook of hamate) fracture
Diagnostic Imaging Orthopedics, David W. Stoller. MD. FACR, Phillip F.J. Tirman. MD, Miriam A. Bredella. MD, et al.