Research Article
Synovial Chondrosarcoma Arising in Synovial Chondromatosis
Table 1
Details of the patients, their tumours, and the outcome.
| Case | Age at diagnosis with SC (years) | Site | Treatment(s) for SC | Time to malignant change (years) | Malignancy | Surgical management of chondrosarcoma | Mets | Outcome |
| 1 | 23 | Hip | 3 debridements | 2.7 | Grade I CHS | Hindquarter amputation | — | Alive 13 yrs postoperatively | 2 | 48 | Hip | (i) Initially symptomatic (ii) THR 11 yrs after initial diagnosis | 11.3 | Dedifferentiated chondrosarcoma (osteosarcoma) | Debulking | At presentation (lung) | Died 3 yrs postoperatively | 3 | 25 | Hip | (i) 2 arthroscopies (ii) 1 hip resurfacing 17 yrs after diagnosis | 20 | Grade II CHS | Debulking | At presentation (lung) | Died 4 yrs postoperatively | 4 | 25 | Hip | (i) Multiple debridements (ii) THR 2005 (iii) Large recurrence 5 years after THR | 39 | Grade I CHS | Hindquarter amputation | — | Alive 9 months postoperatively | 5 | 19 | Knee | (i) Multiple arthroscopies (ii) TKR aged 55 | 38.5 | Grade II CHS | Above knee amputation | Lung—34 months after amputation | Died 4 yrs postoperatively |
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