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OSTEOCHONDRITIS DISSECANS OF THE TARSAL NAVICULAR BONE



Abstract

Background: Seven cases of osteochondritis dissecans (OCD) of the tarsal navicular bone have been described mainly radiologically.

Aims: We report our experience with additional 6 patients which represent the largest series described, and conclude about the treatment modalities in this unique type of OCD.

Methods: All patients who had OCD of the tarsal navicular bone during the years 1993 and 1998 were evaluated. The parameters which were examined were the age and sex of the patients, the location of pain, duration of symptoms, and any trigger mechanism if this was noted. The various treatments used for these patients as well as their outcome were recorded.

Results: Six patients were treated by us between 1993 and 1998 (follow up 3–7 years). There were 4 males and 2 females aged between 14 and 35 years (mean 21 years). All patients had pain in the dorsal aspect of the midfoot, and painful limitation in midfoot movements. Duration of symptoms varied between 4 months and 1 year. In 3 patients basic training in army service and in one running short distances triggered the pain. In 3 patients an accompanying stress fracture of the navicular bone was developed. Three patients were managed conservatively. Two patients underwent excision, curettage and drilling, and one patient underwent excision and fusion. All patients, whether treated conservatively or surgically, still suffer form pain in activities and painful limitation of midfoot motion.

Conclusions: OCD of tarsal navicular bone affects mainly young patients. Physical efforts are the trigger mechanism for the symptoms. The clinical presentation includes painful limitation in midfoot motion. The outcome is reserved both for conservative or operative treatment.

The abstracts were prepared by Orah Naor. Correspondence should be addressed to him at the Israel Orthopaedic Association, PO Box 7845, Haifa 31074, Israel.