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We report two cases of acquired macular (hyper)pigmentation of uncertain aetiology diagnosed as ashy dermatosis and attempt to clarify the various confusing nosologies based on existing literature. We infer that acquired small and large macular pigmentation of uncertain aetiology should be considered separate from that associated with lichen planus. We also propose a diagnostic algorithm for patients with acquired macular hyperpigmentation.<\/jats:p>","DOI":"10.1111\/ajd.12428","type":"journal-article","created":{"date-parts":[[2016,2,1]],"date-time":"2016-02-01T08:44:38Z","timestamp":1454316278000},"page":"45-49","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Macular pigmentation of uncertain aetiology revisited: two case reports and a proposed algorithm for clinical classification"],"prefix":"10.1111","volume":"58","author":[{"given":"Veena","family":"Chandran","sequence":"first","affiliation":[{"name":"Research Assistant Western Dermatology Perth Western Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sujith Prasad","family":"Kumarasinghe","sequence":"additional","affiliation":[{"name":"Department of Dermatology Fiona Stanley Hospital Perth Western Australia Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2016,2]]},"reference":[{"key":"e_1_2_8_2_1","unstructured":"RamirezCO.Los cenicientos problema clinico. 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