Paper 34: Midterm Outcomes of Meniscal Allograft Transplantation in the Adolescent Population

Objectives: To report midterm outcomes following primary meniscal allograft transplantation (MAT) from a single surgeon in an adolescent population. Methods: A retrospective review was performed to identify patients <18 years old at the time of MAT 1999-2016. International Knee Documentation Committee (IKDC), Injury and Osteoarthritis Outcome Score (KOOS) subscales, Lysholm scores were collected preoperatively 1-year, 2-years, minimum 5-years follow-up. Results: Forty-four (female n=33; male n=11) 62 identified (71%) met inclusion criteria with mean follow-up 9.5 ± 3.8 (range: 5.0-17.7). Isolated 27 (61.3%) patients. Common concomitant procedures included osteochondral (OCA) (n=14, 31.8%), autologous chondrocyte implantation (ACI) (n=8, 18.1%), anterior cruciate ligament reconstruction (ACLR) (n=6, 13.6%) (Table 1). Eleven (25%) required reoperation average 5.9 4.5 0.8 – 14.0) post-transplant. Three (6.8%) for failure, requiring revision 1.1 2.8-4.9) Graft survivability 1, 2, 5, 10 100.0%, 93.2%, respectively (Figure When compared preoperative scores, significant increases Lysholm, IKDC, KOOS subscales observed 2-year, most recent 2 Supplemental Table 90% reported satisfaction their current physical status. Conclusions: At follow-up, population resulted predictable improvements functional outcomes. These maintained years. The rate 25% 71.3% probability being free 5 while graft 93.2% extant literature profiling adult population, adolescents who undergo demonstrate similar survivability. [Table: see text]