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This notice provides information about JAMA Dermatology's website usage policy, and no research findings are reported.

This case report describes a 29-year-old Japanese man with follicular mucinosis, suggesting nestin-positive, multipotent hair follicle stem cells may be involved in reticular epithelial degeneration of the outer root sheath.

This study reports a case of ringworm in a Chinchilla lanigera, attributed to stress and contact with canine material contaminated with Microsporum canis.

This case report describes a patient with eosinophilia-myalgia syndrome, likely linked to L-tryptophan use, who developed a skin rash characterized by cutaneous mucinosis.

A man with both skin lesions and lung cancer improved quickly with chemotherapy, suggesting the skin condition might be a reaction to immune system injury.

In this study, researchers found histopathological similarities between L-tryptophan eosinophilic myalgia syndrome and idiopathic eosinophilic fasciitis, with certain unique inflammatory features present in the former.

In this case report, veterinarians observed a 16-year-old mare with symptoms including chronic weight loss, pruritus, muscle atrophy, and lameness, which gradually progressed to neurological issues despite initial treatment.

This case report highlights that equine multisystemic eosinophilic epitheliotropic disease should be considered in horses presenting with skin lesions and gastrointestinal symptoms, as illustrated by the progression in a 5-year-old horse despite treatment.

This case report describes a 31-year-old male who developed eosinophilic pleuropericardial effusion potentially linked to long-term valproic acid use, which resolved after adjusting his medication.

This study reports that six women developed scleroderma while taking L-tryptophan and showed improvement after stopping the supplement and/or starting corticosteroid therapy.

Eosinophilic infiltrate is not a reliable indicator for diagnosing chronic alopecia areata.

Both atopy and eosinophilia are linked to more severe hair loss in people with alopecia areata.

This study found that maternal PPARγ is essential for preventing the production of inflammatory lipids in mouse milk, which can otherwise cause inflammation, alopecia, and growth retardation in nursing pups.

Baricitinib effectively regrew hair in a woman with alopecia universalis after other treatments failed.

This study found that callus extracts from apple 'Hirosaki' may improve collagen synthesis, hair follicle cell proliferation, and possess significant anti-inflammatory properties.

This case study reports that a 15-year-old male with multiple autoimmune conditions showed significant improvement in skin and gastrointestinal symptoms, along with hair regrowth, after 16 weeks of treatment with the JAK-1 inhibitor upadacitinib, demonstrating its potential in managing complex autoimmune disorders.

This article reviews topics from the American Academy of Veterinary Dermatology and American College of Veterinary Dermatology Annual Meeting and contains no new clinical findings.

This study found that scalp involvement in dermatomyositis consistently shows a nonscarring pattern with chronic telogen effluvium, featuring telangiectasia and mucin deposition as universal histologic markers.

In this case study, a 51-year-old Japanese man was diagnosed with desmoplastic trichoepithelioma after histological examination of surgically excised facial plaques.

This review discusses the therapeutic potential of MSC-derived secretomes for treating degenerative and inflammatory diseases, reporting no new clinical results but highlighting their proposed mechanisms and advantages over direct MSC transplantation.

This study found that anti-TNF therapy-induced alopecia exhibits distinct clinical and histopathological features and can mimic psoriatic alopecia and alopecia areata, with some patients improving with topical treatment.

This study identified the presence of apoptotic or necrotic keratinocytes and hair shaft dystrophy as potential markers of hair loss in patients with HIV-1 infection.

Eosinophils are not a reliable marker for diagnosing alopecia areata.

This review discusses various skin infections and conditions that commonly occur in patients with HIV, but it does not report new research findings.

This review discusses the cutaneous manifestations associated with HIV infection, highlighting that these skin conditions often present atypically and are more severe compared to those in non-HIV-infected individuals; it reports no new clinical findings.

Early stage bald spots are linked to skin inflammation and damage to the upper part of the hair follicle.

This study found that adnexal acantholysis does not reliably distinguish pemphigus vulgaris from pemphigus foliaceus, but the level of acantholysis and degree of dyskeratosis serve as distinguishing features among acantholytic disorders.

This review discusses the distinctive non-infective skin presentations of HIV infection from a dermatological perspective and reports no new clinical findings.

This study attempts to classify histomorphologic reactions to drugs to aid in diagnosing drug eruptions, which are common in hospitalized patients but lack specific diagnostic features.

This review examines skin diseases affecting the pinna of dogs and cats, highlighting those unique to this area and noting its role as a common initial site for several conditions; it reports no new results.