Sung-Yun Pai.

Of 67 children tested, only 13 of 33 recipients of grafts from mismatched related donors had full or combined donor B-cell chimerism, in comparison with 8 of 10 recipients of grafts from matched sibling donors and 17 of 24 recipients of grafts from additional donors . B-cell chimerism was more common in children who underwent reduced-intensity or myeloablative conditioning than in those that underwent immunosuppression or did not go through conditioning .Typical types of adult melanoma were more common in group B than group A, at 28 percent versus 16 percent. Group A lesions were also much more likely to possess a Breslow thickness higher than 1 mm, at 92.9 percent, and become classed as stage IIA disease or above, at 92.0 percent, compared with 59.6 percent and 46.0 percent of the lesions seen in group B, respectively. The most common features connected with melanoma in group A were amelanosis , lesional bleeding, elevated bumpy lesions, uniform color , and new advancement.