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To date, three patients under the age of 20 have been described, including the youngest patient who is a 12\u2010year\u2010old child. The exact etiology of LHS still remains uncertain, as there is no evidence of systemic symptoms or increased cancer risk. The final diagnosis of LHS is possible after the exclusion of other, more serious diseases involving skin\u2010mucosal hyperpigmentation, mainly Peutz\u2010Jeghers syndrome (PJS) and Addison's disease (AD). Herein, we present a 16\u2010year\u2010old patient who has been diagnosed with oral hyperpigmentation since the age of 13. We reviewed the clinical and histological findings. In addition, we discussed the differential diagnosis of mucocutaneous hyperpigmentation.<\/jats:p>","DOI":"10.1111\/ijd.15262","type":"journal-article","created":{"date-parts":[[2020,10,29]],"date-time":"2020-10-29T10:28:29Z","timestamp":1603967309000},"page":"1513-1519","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Laugier\u2010Hunziker syndrome: a case report of the pediatric patient and review of the literature"],"prefix":"10.1111","volume":"59","author":[{"given":"Patrycja","family":"Sputa\u2010Grzegrzolka","sequence":"first","affiliation":[{"name":"Division of Anatomy Department of Human Morphology and Embryology Wroclaw Medical University Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zdzislaw","family":"Wozniak","sequence":"additional","affiliation":[{"name":"Department of Pathomorphology Wroclaw Medical University 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