Patellar fractures in children are uncommon and represent 1% of all pediatric fractures. Of all patellar fractures, less than 2% occur in skeletally immature patients, and over half of these are sleeve fractures. Most reported cases of sleeve fractures involve the inferior patellar pole. There is a particularly high male predominance of this injury, with a ratio of 5:1.18 The sleeve fracture was first described in 1979 by Houghton and Ackroyd13 as an avulsion of a small subchondral osseous fragment from the distal pole of the patella together with an extensive sleeve of cartilage and retinaculum pulled from the main body of the patella. To our knowledge, there have been 13 cases reported in the literature of sleeve fractures involving the superior pole of the patella. In reviewing the literature, there is a lack of information pertaining to long-term results. The present case report is of a superior pole sleeve avulsion fracture in an otherwise normal athletic boy, treated operatively and seen back for a 3-year follow-up. The patient and his family were informed that data concerning the case would be submitted for publication, and the study was approved by our institutional review board.