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An athlete complained of chronic knee pain but had minimal findings on physical examination and initial equivocal radiographs. Subsequent tomograms of the knee suggested a patella stress fracture. Three-phase bone imaging confirmed a stress fracture of the inferior pole of the patella.

An exercise-related avulsion injury of the insertion of the pectineus muscle is described. The abnormality was detected on a 4-hour delayed bone scan. Symptomatic injuries of the adductor muscles are uncommon and are not to be confused scintigraphically with a stress fracture of the proximal femoral shaft.

We evaluated forty-eight patients (fifty knees) with pes anserinus transfer at an average of nine years after operation. There was a high incidence of anteromedial and anterolateral rotatory instability. The incidence (54 per cent) of significant roentgenographic changes at follow-up was also high. Although many patients were improved symptomatically after pes anserinus transfer, only nineteen patients (38 per cent) had no limitation of function.

Many studies concerning the injuries occurring in high school and intercollegiate football have been reported, including those emphasizing the number and type of injuries, geographic distribution of injuries, and the rate of injury compared to position, conditioning, officiating, equipment, and type of playing surface. This report focuses on the individual player involved in a sports program for four or five years and emphasizes the statistical probability of that individual sustaining an injury during his playing career. Conclusions, drawn from statistics compiled at Memphis State University from 1975 through 1979, involved 265 athletes. These 265 athletes sustained 283 injuries during this period. Of these 283 injuries, 69% were mild, 20% were moderate, and 11% were severe. The knee was most often involved and suffered the most severe injuries. Ankle injuries accounted for the second highest incidence of injury, but these were primarily mild or moderate injuries. The defensive line, especially the defensive ends, received the greatest percentage of injuries. The probability of injury for the individual player was found to be 106.7% for a five-year participant, 99.1% for a four-year participant, and 46.6% for a one-year participant.

The long-term results of spinal arthrodesis were evaluated in fourteen children and adolescents who had severe spondylolisthesis. Twelve patients had an in situ posterior arthrodesis and the other two had, in addition, open reduction. The two patients who had open reduction lost correction when the rods were removed. At long-term follow-up, which averaged 11.9 years, all patients had a solid fusion and their activities were unrestricted. Two patients were dissatisfied with the cosmetic result. No intraoperative or postoperative complications occurred in association with the in situ arthrodeses that were performed alone. Posterior in situ arthrodesis proved to be an effective, reliable, and safe treatment for severe spondylolisthesis.

Fracture of the metatarsal head is uncommon, and reports are rare of isolated osteochondral fracture of the articular surface of the metatarsal head, as occurred in the 18-year-old man reported here. Good results were obtained with closed reduction by manipulation and traction, followed by cast immobilization for 6 weeks.