Fig. 1
From: Hand osteoid osteoma: evaluation of diagnosis and treatment
a Preoperative anterior–posterior plain graph showing cortical sclerosis. b The sole finding was volar cortical thickening in lateral view. c CT imaging axial section shows nidus formation clearly. d MR imaging sagittal section shows nonspecific edema. e Moderate swelling of the second finger was first finding. f Perioperative image shows cortical defect after curettage. g The postoperative anterior–posterior plain graph shows the cortical defect. h Postoperative lateral view shows the curettage area, possibly a little distal from the nidus center, resulting with a residual lesion