The results of operative treatment of osteochondritis dissecans of the patella

The course of osteochondritis dissecans (OCD) of the patella and the results of operative treatment are ana-lyzed retrospectively in a review of 31 operatively treated cases in 25 patients. Followup was obtained for 21 cases, with an average of 73 months (range, 15 months to 20 years). These 25 patients were predom-inantly males, and averaged 18 years of age at the time of surgery. A history of trauma was associated with the lesion in 38 % of the cases, and the lesion was bilateral in one out of four patients. The most common present-ing complaints were subpatellar pain and swelling. The most common initial physical findings were patellofem-oral crepitus and joint effusion. Forty-four operations were performed on 31 knees. The most commonly performed procedures were cu-rettage of the patella and removal of loose bodies, in combination or as part of another procedure. A new patellofemoral rating scale was used to evaluate re-sults. Thirty-eight percent of the knees had a good or excellent result, while 62 % had a fair or poor result. Persistent pain with restricted function and residual patellofemoral crepitus were common findings. In general, the patients who come to surgery for OCD of the patella have a guarded prognosis for full recovery of knee function. OCD of the patella is a rare condition. A case was first reported in the literature in 1936 by Rombold.29 To date, 78 cases of osteochondritis dissecans of the patella are men-tioned in the world literature, with 11 patients demonstrat