BOSTON ( TheStreet) -- The Russell Midcap Index soared 54% during the past year, beating its large- and small-cap counterparts. The following five mid-cap stocks are likely to outperform in 2010. 5. Bio-Reference Laboratories ( BRLI) provides clinical testing services in the New York metropolitan area. The numbers: Fiscal fourth-quarter profit increased 37% to $7.2 million, or 51 cents a share, as revenue advanced 26% to $102 million. Bio-Reference's operating margin expanded from 12% to 13%. Its quick ratio of 1.9 and debt-to-equity ratio of 0.2 reflect a strong financial position. The stock: Bio-Reference Laboratories increased 61% during the past year, outpacing major U.S. indices. The stock trades at a price-to-earnings ratio of 25, a premium to health care peers. Bio-Reference doesn't pay dividends.