Blood Types and the Population. O positive is the most common blood type. Not all ethnic groups have the same mix of these blood types. Hispanic people, for example, have a relatively high number of Oâs, while Asian people have a relatively high number of Bâs.The mix of the different blood types in the U.S. population is:n addition to the A and B antigens, there is a third antigen called the Rh factor, which can be either present (+) or absent (â). In general, Rh negative blood is given to Rh-negative patients, and Rh positive blood or Rh negative blood may be given to Rh positive patients.
Medical Definition of LENTIGO. 1. : a small melanotic spot in the skin in which the formation of pigment is unrelated to exposure to sunlight and which is potentially malignant; especially: nevusâcompare freckle. 2. : freckle.
Lentigines, or liver spots, are benign lesions that occur on the sun-exposed areas of the body.The backs of hands and face are common areas. The lesions tend to increase in number with age, making them common among the middle age and older population. They can vary in size from 0.2 to 2 cm.hese include sunscreen and protective clothing, such as hats and long sleeves. Back to Index. Lentigines, or liver spots, are benign lesions that occur on the sun-exposed areas of the body. The backs of hands and face are common areas.