=e wal : we ~ . 0 OT pe 5 Ee NO sy Prate 21.—(V100, MW&&) Epidermis: Extensive trans epidermal damage (ierth slightly less involved zones on either side), Loose famination of stratum corneum, absence of stration yranulosum, Parakeratinization wth crfoliation of pigment containing cells. nanization of the malpiyhian layer. Uisor- Dermis: \lild eden of pars papillaris with indestinct capillary loops. Perwascutar cetlidar infiltrate (lym phoentes and aona- nuclear phagocytes), in superficial carom weth tlangiectases. Case 20. Puate 22.—(V100, H&E) Epidermis: Arcades of minimal damage occur in relation to ererctory ducts of sweat wlands. Stratum granulosum of qood width and shows scant alteration. Cniderlying stratum malpeghtt shows decrease in prqaient. fn the deeper portion of the overlyind, toosely famenated stravan cornenin moderate amounts of pigment, howerer, are present, One narrow arerde af moe severe transepitermal damage at the left af the ghotomacrograph shows aiteration of the sleatim wena ctostan weth ratercediudar edema, pyknasts, sivollen rictet, and pigntent scattered throughout. The latter ts o speemtty dense tr the contiguons parakeratotic matrind Dermis: Ab moderate celludar infiltrate, chic tly perwascular, is most pronounced in the supers fieral pars relicularts where there isa meld (elanqeectases. Case 20.