{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,6]],"date-time":"2026-01-06T17:39:39Z","timestamp":1767721179049,"version":"3.48.0"},"reference-count":16,"publisher":"BMJ","issue":"1","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2025,12,12]]},"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>We present two cases of inflammatory dermatoses following Blaschko\u2019s lines on the thigh. The first case presented with pruritic violaceous papules with comedone-like openings, diagnosed as hypertrophic lichen planus. The second case developed linear hyperpigmented papules and plaques, diagnosed as lichen striatus. Both conditions presented similarly in their blaschkoid distribution but were differentiated through integrated clinico\u2013dermoscopic\u2013histopathological correlation. Dermoscopy revealed follicular plugs with blue-grey globules over a purple background in hypertrophic lichen planus, while lichen striatus showed patchy dotted vessels with white areas and erosions. Histopathologically, follicular involvement and melanophages characterised hypertrophic lichen planus, whereas deep peri-eccrine lymphocytic infiltrates were distinctive for lichen striatus. This report highlights the diagnostic utility of dermoscopy in differentiating clinically similar blaschkoid dermatoses.<\/jats:p>","DOI":"10.1136\/bcr-2025-269262","type":"journal-article","created":{"date-parts":[[2026,1,6]],"date-time":"2026-01-06T17:35:20Z","timestamp":1767720920000},"page":"e269262","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Papules in a blaschkoid distribution on the thigh"],"prefix":"10.1136","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3563-1868","authenticated-orcid":false,"given":"Avita","family":"Dhiman","sequence":"first","affiliation":[{"name":"Dermatology, All India Institute of Medical Sciences Bilaspur, Bilaspur, HP, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Payal","family":"Chauhan","sequence":"additional","affiliation":[{"name":"Dermatology, All India Institute of Medical Sciences Jammu, Vijaypur, Vijaypur, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Manju","family":"Daroach","sequence":"additional","affiliation":[{"name":"Dermatology, All India Institute of Medical Sciences Bilaspur, Bilaspur, HP, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2026,1,6]]},"reference":[{"key":"2026010609351350000_19.1.e269262.1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2133.1976.tb00835.x"},{"key":"2026010609351350000_19.1.e269262.2","doi-asserted-by":"crossref","DOI":"10.5826\/dpc.1503a5568","article-title":"Dermoscopy of de novo Syringocystadenoma Papilliferum in Dark and Fair Skin","volume":"15","author":"Plozner","year":"2025","journal-title":"Dermatol Pract Concept"},{"key":"2026010609351350000_19.1.e269262.3","doi-asserted-by":"crossref","DOI":"10.3390\/dermatopathology12010008","article-title":"Hypertrophic Lichen Planus and Hypertrophic Skin Lesions Associated with Histological Lichenoid Infiltrate: A Case Report and Literature Review","volume":"12","author":"Scotti","year":"2025","journal-title":"Dermatopathology (Basel)"},{"key":"2026010609351350000_19.1.e269262.4","doi-asserted-by":"crossref","first-page":"26","DOI":"10.33545\/pathol.2021.v4.i3a.385","article-title":"Histological differential diagnosis of verruca vulgaris: A systematic review","volume":"4","author":"Alaziz","year":"2021","journal-title":"Int J Clin Diagn Pathol"},{"key":"2026010609351350000_19.1.e269262.5","doi-asserted-by":"crossref","first-page":"393","DOI":"10.4103\/0019-5154.117317","article-title":"Papular acantholytic dyskeratosis localized to the perineal and perianal area in a young male","volume":"58","author":"Verma","year":"2013","journal-title":"Indian J Dermatol"},{"key":"2026010609351350000_19.1.e269262.6","doi-asserted-by":"crossref","DOI":"10.4103\/ijd.ijd_880_21","article-title":"Verrucous Epidermal Nevus with Unusual Presentations: A Case Series of 5 Cases","volume":"67","author":"Saini","year":"2022","journal-title":"Indian J Dermatol"},{"key":"2026010609351350000_19.1.e269262.7","first-page":"135","article-title":"Dermoscopy to differentiate clinically similar inflammatory and neoplastic skin lesions","volume":"159","author":"Bazzacco","year":"2024","journal-title":"Ital J Dermatol Venerol"},{"key":"2026010609351350000_19.1.e269262.8","doi-asserted-by":"crossref","DOI":"10.5826\/dpc.1301a6","article-title":"Lichen Striatus Post-COVID-19 Infection: Clinical and Dermoscopic Presentations","volume":"13","author":"Chersi","year":"2023","journal-title":"Dermatol Pract Concept"},{"key":"2026010609351350000_19.1.e269262.9","doi-asserted-by":"crossref","first-page":"45","DOI":"10.4103\/idoj.IDOJ_613_20","article-title":"Dermatoscopy of Inflammatory Diseases in Skin of Color","volume":"12","author":"Bhat","year":"2021","journal-title":"Indian Dermatol Online J"},{"key":"2026010609351350000_19.1.e269262.10","doi-asserted-by":"crossref","first-page":"44","DOI":"10.5826\/dpc.0901a11","article-title":"Dermoscopic Features of Psoriasis, Lichen Planus, and Pityriasis Rosea in Patients With Skin Type IV and Darker Attending the Regional Dermatology Training Centre in Northern Tanzania","volume":"9","author":"Nwako-Mohamadi","year":"2019","journal-title":"Dermatol Pract Concept"},{"key":"2026010609351350000_19.1.e269262.11","doi-asserted-by":"crossref","first-page":"9","DOI":"10.5826\/dpc.0602a03","article-title":"Hypertrophic lichen planus versus prurigo nodularis: a dermoscopic perspective","volume":"6","author":"Ankad","year":"2016","journal-title":"Dermatol Pract Concept"},{"key":"2026010609351350000_19.1.e269262.12","doi-asserted-by":"crossref","first-page":"185","DOI":"10.4103\/idoj.IDOJ_254_20","article-title":"Unilateral Linear Lichen Planus Hypertrophicus Along Blaschko\u2019s Lines","volume":"12","author":"Kapoor","year":"2021","journal-title":"Indian Dermatol Online J"},{"key":"2026010609351350000_19.1.e269262.13","unstructured":"Wilson SM , Pollinger T , Turiansky G . An atypical presentation of unilateral, linear, hypertrophic lichen planus in a patient with HIV. Pract Dermatol 2016;24\u20136."},{"key":"2026010609351350000_19.1.e269262.14","doi-asserted-by":"crossref","first-page":"96","DOI":"10.7241\/ourd.20211.30","article-title":"\u201cBouquet of white roses\u201d: A dermoscopic marker for hypertrophic lichen planus","volume":"12","author":"Malakar","year":"2021","journal-title":"Our Dermatol Online"},{"key":"2026010609351350000_19.1.e269262.15","doi-asserted-by":"crossref","first-page":"233","DOI":"10.2174\/0115733963273945240101042423","article-title":"Lichen Striatus: An Updated Review","volume":"21","author":"Leung","year":"2025","journal-title":"Curr Pediatr Rev"},{"key":"2026010609351350000_19.1.e269262.16","doi-asserted-by":"crossref","first-page":"e355","DOI":"10.1111\/1346-8138.14035","article-title":"Dermoscopy of linear dermatosis along Blaschko\u2019s line in childhood: Lichen striatus versus inflammatory linear verrucous epidermal nevus","volume":"44","author":"Kim","year":"2017","journal-title":"J Dermatol"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2025-269262","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,6]],"date-time":"2026-01-06T17:35:22Z","timestamp":1767720922000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2025-269262"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,1]]},"references-count":16,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2026,1,6]]},"published-print":{"date-parts":[[2026,1]]}},"alternative-id":["10.1136\/bcr-2025-269262"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2025-269262","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,1]]}}}