The San Miguel Beer gunslinger suffered a grade two MCL injury on July 25 during the series against Rain or Shine, causing him to miss the PBA Commissioner's Cup duel with TNT and a possible FIba World Cup stint with Gilas Pilipinas.
"If it had been the ACL, that wouldn't have borne thinking about so I was just very fortunate the scans showed that the ACL was still intact - instead it was a grade-three MCL injury which doesn't require surgery.
On the physical exam of the left knee, the Lachman maneuver was grade 2B (ACL injury with 5-10 mm translation without an endpoint), the varus stress test grade 3 (complete LCL tear with >10 mm opening of the lateral joint), and the valgus stress test grade 2 (MCL injury with 6-10 mm opening of the medial joint).
One study has used rabbit stem cells derived from the MCL in order to repair a MCL injury. When introduced to the injury site, MCL stem cells (MCLSCs) alone induced repair and remodelling with expression of collagen type I and the formation of aligned collagen fibres, as well as increased vascularisation.