Development of a Cutaneous Horn on a Lower Extremity with Granuloma Annulare: A Rare Co-Occurrence

Xiaolin Bu,1,* Liwei Feng,2,* Jing Guo,3 Rongzhu Yu,2 Xinling Bi4 1Laboratory of Laser and Medical Innovation Application, Department of Dermatology, Gongli Hospital of Shanghai Pudong New Area, Shanghai, People’s Republic of China; 2School of Gongli Hospital Medical Technolo...

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Main Authors: Bu X, Feng L, Guo J, Yu R, Bi X
Format: Article
Language:English
Published: Dove Medical Press 2025-07-01
Series:Clinical, Cosmetic and Investigational Dermatology
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Online Access:https://www.dovepress.com/development-of-a-cutaneous-horn-on-a-lower-extremity-with-granuloma-an-peer-reviewed-fulltext-article-CCID
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author Bu X
Feng L
Guo J
Yu R
Bi X
author_facet Bu X
Feng L
Guo J
Yu R
Bi X
author_sort Bu X
collection DOAJ
description Xiaolin Bu,1,* Liwei Feng,2,* Jing Guo,3 Rongzhu Yu,2 Xinling Bi4 1Laboratory of Laser and Medical Innovation Application, Department of Dermatology, Gongli Hospital of Shanghai Pudong New Area, Shanghai, People’s Republic of China; 2School of Gongli Hospital Medical Technology, University of Shanghai for Science and Technology, Shanghai, People’s Republic of China; 3Postgraduate Training Base at Shanghai Gongli Hospital, Ningxia Medical University, Shanghai, People’s Republic of China; 4Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, People’s Republic of China*These authors contributed equally to this workCorrespondence: Xinling Bi, Department of Dermatology, Changhai Hospital, Naval Medical University, 168 Changhai Road, YangPu District, Shanghai, People’s Republic of China, Email bixinling@163.comAbstract: A 65-year-old Asian male presented with a circular skin lesion on the flexor aspect of the right calf that first appeared at age 13 and gradually expanded peripherally. Six months prior to presentation, a dark brown, horn-like keratotic lesion with a hard texture emerged on the annular lesion, growing progressively without pain or pruritus. The cutaneous horn was surgically excised, and the annular lesion underwent biopsy. Pathological findings revealed abundant mucin in dermal collagen, dense histiocyte infiltration, and focal mild collagen degeneration, confirming a diagnosis of granuloma annulare complicated by a cutaneous horn.Keywords: cutaneous horn, granuloma annulare, keratotic
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spelling doaj-art-01e681af9c574ee5a0c73b35fec79be12025-08-20T03:13:05ZengDove Medical PressClinical, Cosmetic and Investigational Dermatology1178-70152025-07-01Volume 18Issue 117531756104973Development of a Cutaneous Horn on a Lower Extremity with Granuloma Annulare: A Rare Co-OccurrenceBu X0Feng L1Guo J2Yu R3Bi X4DermatologySchool of Gongli Hospital Medical Technology,Postgraduate training base at Shanghai Gongli HospitalSchool of Gongli Hospital Medical TechnologyDepartment of DermatologyXiaolin Bu,1,* Liwei Feng,2,* Jing Guo,3 Rongzhu Yu,2 Xinling Bi4 1Laboratory of Laser and Medical Innovation Application, Department of Dermatology, Gongli Hospital of Shanghai Pudong New Area, Shanghai, People’s Republic of China; 2School of Gongli Hospital Medical Technology, University of Shanghai for Science and Technology, Shanghai, People’s Republic of China; 3Postgraduate Training Base at Shanghai Gongli Hospital, Ningxia Medical University, Shanghai, People’s Republic of China; 4Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, People’s Republic of China*These authors contributed equally to this workCorrespondence: Xinling Bi, Department of Dermatology, Changhai Hospital, Naval Medical University, 168 Changhai Road, YangPu District, Shanghai, People’s Republic of China, Email bixinling@163.comAbstract: A 65-year-old Asian male presented with a circular skin lesion on the flexor aspect of the right calf that first appeared at age 13 and gradually expanded peripherally. Six months prior to presentation, a dark brown, horn-like keratotic lesion with a hard texture emerged on the annular lesion, growing progressively without pain or pruritus. The cutaneous horn was surgically excised, and the annular lesion underwent biopsy. Pathological findings revealed abundant mucin in dermal collagen, dense histiocyte infiltration, and focal mild collagen degeneration, confirming a diagnosis of granuloma annulare complicated by a cutaneous horn.Keywords: cutaneous horn, granuloma annulare, keratotichttps://www.dovepress.com/development-of-a-cutaneous-horn-on-a-lower-extremity-with-granuloma-an-peer-reviewed-fulltext-article-CCIDCutaneous horngranuloma annularekeratotic
spellingShingle Bu X
Feng L
Guo J
Yu R
Bi X
Development of a Cutaneous Horn on a Lower Extremity with Granuloma Annulare: A Rare Co-Occurrence
Clinical, Cosmetic and Investigational Dermatology
Cutaneous horn
granuloma annulare
keratotic
title Development of a Cutaneous Horn on a Lower Extremity with Granuloma Annulare: A Rare Co-Occurrence
title_full Development of a Cutaneous Horn on a Lower Extremity with Granuloma Annulare: A Rare Co-Occurrence
title_fullStr Development of a Cutaneous Horn on a Lower Extremity with Granuloma Annulare: A Rare Co-Occurrence
title_full_unstemmed Development of a Cutaneous Horn on a Lower Extremity with Granuloma Annulare: A Rare Co-Occurrence
title_short Development of a Cutaneous Horn on a Lower Extremity with Granuloma Annulare: A Rare Co-Occurrence
title_sort development of a cutaneous horn on a lower extremity with granuloma annulare a rare co occurrence
topic Cutaneous horn
granuloma annulare
keratotic
url https://www.dovepress.com/development-of-a-cutaneous-horn-on-a-lower-extremity-with-granuloma-an-peer-reviewed-fulltext-article-CCID
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