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http://dx.doi.org/10.1097/JW9.0000000000000033DOI Listing

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A 39-year-old woman presented to the dermatology department in January 2022 with a 3-week history of a progressively enlarging and intensely pruritic erythematous annular nodule on her left hand. The lesion started as a small blister, which was initially presumed to be a flare up of her pompholyx dermatitis. On her physician's advice, she applied clobetasol propionate ointment twice daily for 5 days; however the blister continued to increase in size until it burst, revealing raw inflamed skin.

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Erythema Papulatum Centrifugum: A Case Report of an Underrecognized Annular Erythema.

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September 2024

Division of Dermatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.

Erythema papulatum centrifugum (EPC), also known as erythema papulosa semicircularis recidivans, is a rare dermatological condition characterized by single or multiple annular or semi-annular centrifugally growing lesions surrounded by tiny erythematous papules typically observed on the trunk. EPC is prevalent, particularly in Japan and China, although only a few cases have been reported outside Asia. Herein, we present the case of a 47-year-old female from Thailand who experienced a pruritic annular erythematous rash on her right arm for two months.

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Pigmented actinic lichen planus: a case report.

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Article Synopsis
  • Actinic lichen planus (ALP) is a rare and photosensitive form of lichen planus, most common in younger dark-skinned females from warmer regions, with four recognized types including pigmented and classic forms.
  • A case study describes a 68-year-old white man with a 9-year history of a mildly itchy hyperpigmented patch on his nose, ultimately diagnosed as pigmented ALP through histopathological analysis showing characteristic changes.
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Article Synopsis
  • A 47-year-old woman with several autoimmune and metabolic conditions presented with a painful skin rash characterized by raised, yellow-centered plaques on sun-exposed areas.
  • A biopsy revealed specific histopathological features that led to a diagnosis of annular elastolytic giant cell granuloma (AEGCG), a rare inflammatory skin disorder potentially triggered by sunlight exposure.
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Introduction: Actinic granuloma (AG) is a rare skin eruption thought to result from a sun-induced inflammatory response attracting giant cells, which are large, multinucleated, and inflammatory, to form granulomas and degrade surrounding elastic material. Clinically, lesions begin on sun-exposed skin as pink papules and nodules that coalesce into demarcated annular plaques with a hypopigmented center. Histologically, actinic elastosis surrounds the outer annulus ring, with histiocytes and giant cells within the raised border, and the innermost central zone is filled with minimal to absent elastic fibers.

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