Fig. 1
From: Hidden musculoskeletal involvement in inflammatory bowel disease: a multicenter ultrasound study
Upper panels: normal enthesis. A1) quadriceps; A2) distal patellar; A3) Achilles; A4: proximal plantar aponeurosis. Lower panels: pathological enthesis showing increased thickness (blue arrows), enthesophyte (blue arrowhead), calcifications (open arrow) and abnormal blood flow (asterisk). B1) quadriceps; B2) distal patellar; B3) Achilles; B4) proximal plantar aponeurosis. t – tendon; c – calcaneus bone; tb –tibial bone