Sinding-Larsen-Johansson综合征是一种影响髌骨下极的骨软骨病。大多数病例可以很容易地诊断有足够的临床病史，体检,和适当的成像，包括常规射线照相术，超声，和磁共振成像。将这种情况与髌骨袖状撕脱骨折区分开来很重要，因为后者的治疗通常是手术。这两种情况之间也可能发生重叠。我们提出了一个11岁男孩的案例，双膝Sinding-Larsen-Johansson综合征和左膝最小移位的急性髌骨撕脱袖状骨折，这是保守对待。
Sinding-Larsen-Johansson syndrome is an osteochondrosis affecting the inferior pole of the patella. Most cases can be easily diagnosed with adequate clinical history, physical examination, and proper imaging, including conventional radiography, ultrasound, and magnetic resonance imaging. Differentiating this condition from patellar sleeve avulsion fractures is important, since treatment is frequently surgical in the latter. Overlap between these two conditions can also occur. We present a case of an 11-year-old boy, with Sinding-Larsen-Johansson syndrome on both knees and a minimally displaced acute patellar avulsion sleeve fracture of the left knee, which was treated conservatively.
