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Longitudinal view: 1) Thickened A1 annular pulley; 2) FDS; 3) Nodule within FDS; 4) FDP; 5) Palmar plate; 6) Head of first metacarpal; 7) Base of proximal phalanx; 8) Hyaline cartilage of head of metacarpal bone; 9) Ganglion on A1 annular pulley.
Image taken from the studied patient.
