EE REPORTED SWELLING OF HIS RIGHT KNEE ALLEDGELLY CAUSE BY WORKING ON HIS KNEES OVER A METAL GRATING AT THE CONVEYORS BELTS. MEDICAL EVALUATION SHOWS DEGENERATIVE OSTEOARTHRITIS, JOINT FUSION AND POSSIBLE MENISCAL TIER. EE REPORTED HIS CONDITION AFTER RETURNING FROM HIS VACATION PERIOD. CAS WAS REFERED TO THE PUERTO RICO STATE WORKER COMPENSATION INSURANCE FUND FOR MEDICAL TREATMEN