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Intraosseous Pseudotumor After Knee Viscosupplementation: A Case Report
Antonio Arenas1, Jose Javier Lopez-Blasco, Pilar Fernandez
1Department of Orthopaedic Surgery (Clinica Ubarmin) (A.A., J.J.L.-B.) and Department of Pathology (P.F.), Complejo Hospitalario de Navarra, Aoiz Road, Down Floor, 31486, Elcano-Egües, Navarra, Spain.
Case:
A sixty-eight-year-old woman with osteoarthritis in the right knee who had received a single injection of a commercial hyaluronic acid preparation presented with an intraosseous mass that had not appeared in previous imaging studies. Open biopsy and curettage was performed, and a reactive pseudotumor related to viscosupplementation was diagnosed. At the last follow-up fourteen months after surgery, the patient had experienced no recurrence of the lesion.
Conclusion:
Viscosupplementation is considered a conservative treatment option for early-stage knee osteoarthritis. To the best of our knowledge, this complication, namely an intraosseous mass, has not been described previously in the literature.
