File:PMC4288267 art0066-2429-f1.png

English: fig01: Pelvic radiographs obtained from our enthesophyte atlas, showing examples of mild enthesophytes (grade 1), characterized by subtle new bone formation at the anterior superior iliac spine (ASIS) and greater trochanter (vertical arrows) (A), moderate enthesophytes (grade 2), characterized by new bone formation mainly at the ASIS and greater trochanter (B), and florid enthesophytes (grade 3), characterized by marked new bone formation around the ASIS, iliac crests, greater and lesser trochanters, and, to a lesser extent, the ischial tuberosity (C). Horizontal arrows indicate the presence of osteophytes at the superior acetabular margin in A–C and at the left medial femur in C. Example images were made available as full-screen digital images to readers during scoring.