Fig. 2.

Axial and coronal HR-pQCT images showing metacarpal heads 2–4 (axial view) and MCP joints 2–4 (coronal view) of a patient with HH. Note the distinct features of hemochromatosis arthropathy: characteristic hook- or beak-like osteophytes at the metacarpal heads are seen (white arrows) along with small cysts. In addition, areas of sparse to absent trabecular bone structure are noted in the center of the metacarpal heads 2 and 3 (dashed white arrow) indicative of a HH-related impairment of bone microarchitecture