507 A.2d 922 Martin Dale Preston, Petitioner v. Workmen’s Compensation Appeal Board (Department of Transportation), Respondents. Commonwealth Court of Pennsylvania.Argued March 14, 1986 April 15, 1986. Workmen’s compensation — Recurrence — Aggravation — Hypertension. 1. In a workmen’s compensation case, a court deciding whether there has been a compensable recurrence of a medical condition which […]