{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T15:12:23Z","timestamp":1777907543015,"version":"3.51.4"},"reference-count":16,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2025,9,16]],"date-time":"2025-09-16T00:00:00Z","timestamp":1757980800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Trop Doct"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>\n                    Vitamin B\n                    <jats:sub>12<\/jats:sub>\n                    deficiency can manifest in various forms, including skin changes in the form of hyperpigmentation. The hyperpigmentation in vitamin B\n                    <jats:sub>12<\/jats:sub>\n                    deficiency commonly presents over the hands and feet, but presenting over the face and oral cavity is very rare. Here we describe an interesting case where there was hyperpigmentation in the face and oral cavity which was mimicking Addison's disease, but the actual diagnosis was vitamin B\n                    <jats:sub>12<\/jats:sub>\n                    deficiency. This case stresses that knowing the uncommon manifestations of common disease is more important than knowing the common manifestations of uncommon disease.\n                  <\/jats:p>","DOI":"10.1177\/00494755251378821","type":"journal-article","created":{"date-parts":[[2025,9,16]],"date-time":"2025-09-16T18:15:56Z","timestamp":1758046556000},"page":"215-218","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["The mask of deficiency: A rare case of facial hyperpigmentation in vitamin B\n                    <sub>12<\/sub>\n                    deficiency \u2013 a case report and review of literature"],"prefix":"10.1177","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-1998-8825","authenticated-orcid":false,"given":"Ram Arvind","family":"Viswanathan","sequence":"first","affiliation":[{"name":"Sri Manakula Vinayagar Medical College and Hospital"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,9,16]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.4103\/ijem.IJEM_122_19"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1177\/15648265080292S129"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.3390\/nu2030299"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMcp1113996"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.4103\/0028-3886.15057"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.1.5347.1713"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1177\/0884533616670380"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.5005\/jp-journals-10070-8008"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.4103\/2230-8210.119591"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.4103\/0378-6323.27766"},{"key":"e_1_3_3_12_2","first-page":"57","article-title":"Mucocutaneous hyperpigmentation as the initial manifestation of vitamin B12 deficiency in an infant","volume":"1","author":"Sharath S","year":"2023","unstructured":"Sharath S, Sinha S. Mucocutaneous hyperpigmentation as the initial manifestation of vitamin B12 deficiency in an infant. Asian J Pediatr Dermatol 2023; 1: 57\u201359.","journal-title":"Asian J Pediatr Dermatol"},{"key":"e_1_3_3_13_2","doi-asserted-by":"publisher","DOI":"10.25259\/IJPGD_116_2023"},{"key":"e_1_3_3_14_2","doi-asserted-by":"publisher","DOI":"10.3329\/jbcps.v39i1.50461"},{"key":"e_1_3_3_15_2","doi-asserted-by":"publisher","DOI":"10.3390\/ijms19092845"},{"key":"e_1_3_3_16_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1346-8138.2001.tb00134.x"},{"key":"e_1_3_3_17_2","first-page":"714","article-title":"Generalised hyperpigmentation in vitamin B12 deficiency","volume":"62","author":"Santra G","year":"2014","unstructured":"Santra G, Paul R, Ghosh SK, et al. Generalised hyperpigmentation in vitamin B12 deficiency. J Assoc Physicians India 2014; 62: 714\u2013716.","journal-title":"J Assoc Physicians India"}],"container-title":["Tropical Doctor"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/00494755251378821","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/00494755251378821","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/00494755251378821","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T13:37:38Z","timestamp":1777642658000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/00494755251378821"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,9,16]]},"references-count":16,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,1]]}},"alternative-id":["10.1177\/00494755251378821"],"URL":"https:\/\/doi.org\/10.1177\/00494755251378821","relation":{},"ISSN":["0049-4755","1758-1133"],"issn-type":[{"value":"0049-4755","type":"print"},{"value":"1758-1133","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,9,16]]}}}