In 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.1  The universal red cell donor has Type O negative blood type. 2  The universal plasma donor has Type AB blood type.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.
Follow Following Unfollow Pending Disabled. A Honor Society of Nursing (STTI) answered. Symptoms of lentigo maligna melanoma are usually large, flat, irregularly-shaped tan patches on the skin. These growths usually form on sun-exposed skin on the nose, cheeks, ears, and elsewhere on the head and neck.
Lentigines (pleural of lentigo) are flat brown lesions which do not darken following sun exposure (thus differentiating them from ephelides or true freckles). One study of Caucasian women found that lentigines were signs of photo-damage whereas there was a genetic component in true freckles. Lentigines profusa-in this condition, there are widespread lentigines over the arms, legs and genitalia. 2  There are no trigger factors or associated abnormalities (thus differentiating them from a number of lentigo-associated syndromes, see below). 3  The lesions can be 5 mm-2 cm in diameter.