{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T14:50:02Z","timestamp":1786978202832,"version":"build-2736575974"},"reference-count":32,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2007,2,20]],"date-time":"2007-02-20T00:00:00Z","timestamp":1171929600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Lasers Surg Med"],"published-print":{"date-parts":[[2007,3]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background and Objective<\/jats:title>\n                    <jats:p>Photodynamic therapy (PDT) using aminolevulinic acid (ALA) has been previously investigated in the treatment of photodamaged skin. The aim was to assess efficacy and tolerability of methylaminolevulinate (MAL) as a substitute for ALA in PDT treatment of actinic keratosis (AK) and photoaging.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design\/Materials and Methods<\/jats:title>\n                    <jats:p>\n                      Twenty patients with multiple (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009137) AKs and severe photodamage of the face were treated. Metvix\u00ae (Galderma, France) was applied under occlusion for 3 hours before exposure to 37 J\/cm\n                      <jats:sup>2<\/jats:sup>\n                      of red light (Aklilite\u00ae CL 128, Photocure, Norway). Two treatments were given at monthly intervals.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The clearance rate of AKs was 88.3%, and global score which we use to rate photoaging, mottled hyperpigmentation, fine lines, roughness, and sallowness of the skin showed improvement, but deep wrinkles, teleangiectasia, facial erythema, and sebaceous gland hypertrophy did not change. The treatments were well tolerated. High\u2010resolution echography showed an increase in skin thickness, pixels count and area, as well as a reduction of the subepidermal low\u2010echogenic band (SLEB) thickness.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>MAL\u2010PDT is an effective treatment for multiple AKs. In addition, it improves clinical signs of photodamage of the surrounding skin. Lasers Surg. Med. 39:203\u2013209, 2007. \u00a9 2007 Wiley\u2010Liss, Inc.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/lsm.20470","type":"journal-article","created":{"date-parts":[[2007,2,20]],"date-time":"2007-02-20T16:42:24Z","timestamp":1171989744000},"page":"203-209","source":"Crossref","is-referenced-by-count":80,"title":["Clinical and echographic analysis of photodynamic therapy using methylaminolevulinate as sensitizer in the treatment of photodamaged facial 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