Hypertrophic synovial recesses of the radio-carpal and midcarpal joints. a, b Drawings of hypertrophic thickened (a) and rounded pseudotumoral (b) dorsal recesses of the radio-carpal (rc) and midcarpal (mc) joints. c Dorsal sagittal US scan of a hypoechoic thickened radio-carpal recess (1). d Dorsal sagittal US scan of the wrist of a 2-year-old girl in which the hypoechoic rounded radio-carpal recess (arrow) is difficult to distinguish from the hypoechoic cartilage of the radius and navicular bones. Lun = lunate bone; Cap = capitate bone.