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The goal of this observational study is to learn about the outcomes of medial patellofemoral ligament (MPFL) reconstruction for the treatment of recurrent patellar instability. The main questions it aims to answer are: * What are the risk factors for recurrent patellar instability after MPFL reconstruction? * What functional outcomes do patients report after MPFL reconstruction? Participants undergoing MPFL reconstruction will answer survey questions about their knee and activity level 1 year and 2 years after surgery.
The goal of this pilot clinical trial is to compare anterior femoral cutaneous nerve block (AFCN) to adductor canal block ACB) for pediatric patients undergoing either anterior cruciate ligament (ACL) or medial patellofemoral ligament (MPFL). The aims of this trial are: * To measure postoperative functional outcomes in patients who received AFCNB vs. ACB. * To calculate postoperative opioid requirements in pediatric knee surgeries that received AFCNB vs. ACB. * To calculate pain intensity levels at rest and with ambulation in patients who received AFCNB vs. ACB. * To quantify sensory deficits in patients who received AFCNB vs. ACB. * To assess patient-reported outcome measures (e.g., pain expectation scale, pain management satisfaction, PROMIS Pediatric Short Form v1.0 - Physical Activity, PROMIS Scale v1.2 - Global Health) in patients 8-18 years of age who received AFCNB vs. ACB. Subjects undergoing ACL procedures will be compared between those who received the adductor canal block to those who received the anterior femoral cutaneous nerve block. The researchers will also compare individuals who underwent MPFL procedures and received an anterior femoral cutaneous nerve block with those who received the adductor canal block. Participants will: * Be randomized to receive either the AFCNB or ACB in addition to standard of care analgesia. * Maintain a patient diary to document daily pain meds/pain scores * Complete follow up surveys/questionnaires via telephone and during their office visits with surgeons.