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Histological sections (hematoxylin/eosin) of kidneys and livers of fetuses carrying BBS mutations. Case 8 shows normal kidney histology. Cases 1 and 4 show medullary cysts, whereas cases 3, 6, and 2b show kidneys “Meckel-like” lesions. The liver shows moderate portal fibrosis in cases 3 and 2b.
