Dorsal sagittal US scans of the radio-carpal and midcarpal recesses. a, b Hypoechoic rounded radio-carpal (rc) and midcarpal (mc) recesses (a) with hyperemia on the color Doppler examination (b). Lun = lunate bone, Cap = capitate bone. c US-guided puncture with the tip of the needle (arrow) in the radio-carpal recess (rc). Lun = lunate bone, Cap = capitate bone, mc = midcarpal recess. d, e Four-week US follow-up of a midcarpal recess (mc) not treated with steroid injection, showing persistent synovial hypertrophy (d) and hyperemia (e). Lun = lunate bone, Cap = capitate bone.