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We analyzed the time-dependent results after Coventry osteotomy in 118 patients (129 cases) with uni-compartmental osteoarthrosis of the knee. The median follow-up was 11.6 years (range 0.7-17 years). Data were noted according to the time since surgery. Group I (> 2 years) consisted of all 129 cases, group II (> 4 years) of 41 cases and group III (> 8 years) of 15 cases. The HSS knee score (max. 100 points) improved from 33.2 +/- 20.4 (range 17-60) to 68.3 +/- 25.3 (range 30-90) in group I, to 54.7 +/- 18.9 (range 29-90) in group II and to 43.7 +/- 20.9 (range 23-85) in group III. The improvement started 4.6 +/- 7.8 months (range 0-60 months) after the operation and persisted for 4 years +/- 37.4 months (range 0-125 months). The functional knee score (max. 100 points) changed from 61.7 +/- 14.1 (range 41-70) to 71.7 +/- 13.1 (range 53-87) in group I, to 70.0 +/- 11.8 (range 54-88) in group II and to 64.2 +/- 8.0 (range 42-90) in group III. The initial loss in knee flexion was 5.6 degrees (range 0 degree-20 degrees) and for extension 1.0 degree (range -5 degrees-25 degrees). Anteroposterior ligament stability (max. 10 points) decreased from 9.2 +/- 2.1 (range 2-10) to 5.6 +/- 1.7 (range 2-9) in group III. Lateral ligament stability (max. 15 points) was relatively constant, from 12.6 +/- 1.9 (range 4-15) to 9.7 +/- 1.9 (range 2-14). Complications included one tibia fracture, one infection, six peroneus pareses, four haematomas and one pseudarthrosis. The mechanical axis was corrected to an average knee valgu2 of 5.2 degrees +/- 7.4 degrees, which deteriorated over time. Radiographic evidence of arthrosis appeared independent of the operation.

Widespread atrophic lesions and pigmentary disturbances of the skin, distributed in a linear or whorled pattern, are seen in some patients with chondrodysplasia punctata of the Conradi-Hunermann type. Arguments are presented in favor of the hypothesis that this association of anomalies constitutes a distinct genetic disorder, which is inherited as an X-linked dominant trait lethal in hemizygous males.

Sacral tumors are rare and may be clinically overlooked for a long period, because the symptoms and signs are often mild and non-specific. This led to frequent errors in clinical diagnosis and a long delay between the onset of symptoms and treatment. On presentation the lesions frequently expanded the anterior cortex, however, in most patients the periosteum of the sacrum and the presacral fascia form an unbroken barrier for a tumor. The pelvic viscera are not infiltrated by the tumor until late. Wide excision is difficult and often causes urogenital and/or anorectal dysfunction, but preserving the sacral nerve roots often leads to local recurrence. Surgical wide excision with a combined anterior-posterior approach is considered the treatment of choice for large lesions with significant anterior intrapelvic extension. This paper reports data resulting from the treatment of five large sacral tumors with comments on the results.

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