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FIG. 3.   Human foreskin epithelium xenografts grown in the renal capsule of athymic mice following in vitro exposure to SDS. Human foreskin xenografts were exposed to SDS as described in the text. The day 0 graft was not transplanted; this tissue was fixed in 10% buffered formalin immediately following SDS exposure. All other samples were grafted to the renal capsule of athymic mice immediately after exposure to detergent and were harvested on the following days: 0 (a), 5 (b), 11 (c), and 20 (d). Hematoxylin and eosin stain was used. Magnification, ×100.