Regeneration of a Discoid Meniscus after Saucerization, Reinsertion of the Anterior Segment, and Platelet-Rich Plasma Injection in a 17-Year-Old Girl

Discoid lateral meniscus is relatively common in children. Surgical intervention is indicated for symptomatic discoid menisci. We present the case of a symptomatic complete, anteriorly disinserted, discoid lateral meniscus of the left knee in a 17-year-old girl to whom arthroscopic saucerization to reshape the meniscus, plus reinsertion of the anterior segment and platelet-rich plasma injection on the residual rim, was performed. Articular rigidity and swelling marked the initial rehabilitation for an abnormally slow initial recovery. Six months after surgery, a new magnetic resonance imaging was done, which indicated regeneration of the discoid meniscus. Therefore, a new arthroscopy was proposed. We observed a complete regrowth of the remnant reshaped meniscus, which restored the preoperative state. To our knowledge, this is the third report about the regrowth of a discoid meniscus after surgery. Nonetheless, complete discoid meniscus regrowth at such a late age had not been previously reported. This case report demonstrates discoid meniscus regrowth in a young adult.