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Dermatology
Folliculitis, Follicular Occlusion Tetrad, and Other Follicular Disorders
Built from Dermatology, 5th Edition
What’s inside
9 sections · 150 slides
Superficial Folliculitis
Common follicular papules and pustules, their causes, and how to tell them apart
- What this deck covers
- Key features of folliculitis
- Introduction
- Clinical features
- Diagnostic approach to superficial folliculitis
- Culture-negative folliculitis
- Staphylococcal folliculitis of the axilla and beard
- More examples of staphylococcal folliculitis
- Staphylococcal folliculitis with furunculosis
- MRSA folliculitis in atopic dermatitis
- Pathology
- Follicular abscess on biopsy
- Differential diagnosis
- Treatment
- A spectrum of less common specific forms
- Less common specific forms of folliculitis
- Less common specific forms of folliculitis (continued)
- Less common specific forms of folliculitis (continued)
- Pseudomonas hot tub folliculitis: appearance
- Pseudomonas hot tub folliculitis: mechanism
- Pseudomonas hot tub folliculitis: course and prevention
- Dermatophyte and Demodex folliculitis
- Majocchi granuloma
- Herpetic folliculitis: typical presentation
- Herpetic folliculitis in immunosuppression
- Demodex folliculitis: clinical picture
- Demodex folliculitis: diagnosis
- Necrotizing infundibular crystalline folliculitis
Malassezia Folliculitis
A common yeast-driven folliculitis of the trunk, favoured by heat, sweat, and occlusion
- Cause and pathogenesis
- Clinical features and diagnosis
- Treatment
Eosinophilic Folliculitis
Three related disorders with itchy follicular pustules and eosinophils on biopsy
- Three forms of eosinophilic folliculitis
- Ofuji disease: history and key features
- Ofuji disease: epidemiology
- Ofuji disease: pathogenesis
- Ofuji disease: clinical features
- Ofuji disease: pathology and differential diagnosis
- Ofuji disease: treatment
- Immunosuppression-associated eosinophilic folliculitis
- Immunosuppression-associated eosinophilic folliculitis: epidemiology
- Immunosuppression-associated eosinophilic folliculitis: pathogenesis
- Immunosuppression-associated eosinophilic folliculitis: clinical and histologic features
- Another example: forehead papulopustules
- Histologic features in an HIV-positive patient
- Immunosuppression-associated eosinophilic folliculitis: treatment
- Eosinophilic pustular folliculitis of infancy
Disseminate and Recurrent Infundibulofolliculitis
A little-known follicular papular eruption of young adults with darker skin
- Disseminate and recurrent infundibulofolliculitis (DRIF)
- DRIF: pathology and differential diagnosis
- DRIF: treatment
Disorders of Follicular Keratinization
Conditions united by a prominent plug of keratin inside the follicular opening
- What this group of disorders shares
- Erythromelanosis follicularis faciei: introduction
- Erythromelanosis follicularis faciei: epidemiology
- Erythromelanosis follicularis faciei: clinical features
- Erythromelanosis follicularis faciei: pathology
- Erythromelanosis follicularis faciei: differential diagnosis and treatment
- Keratosis pilaris atrophicans: overview
- The spectrum within keratosis pilaris atrophicans
- The spectrum of keratosis pilaris atrophicans
- Ulerythema ophryogenes
- Ulerythema ophryogenes: another example
- Ulerythema ophryogenes: eyebrow redness and hair loss
- Lichen spinulosus: history and epidemiology
- Lichen spinulosus: pathogenesis
- Lichen spinulosus
- Lichen spinulosus: clinical features
- Lichen spinulosus: pathology
- Lichen spinulosus: differential diagnosis
- Differential diagnosis of lichen spinulosus
- Differential diagnosis of lichen spinulosus (continued)
- Differential diagnosis of lichen spinulosus (continued)
- Lichen spinulosus: treatment
- Phrynoderma
Trichostasis Spinulosa and Viral-Associated Trichodysplasia
Two further disorders of the follicle: trapped vellus hairs, and a virus-driven spicule disease
- Trichostasis spinulosa
- Trichostasis spinulosa: pathology
- Viral-associated trichodysplasia spinulosa
- Viral-associated trichodysplasia: pathology and treatment
Deep Folliculitis
Sycosis, pseudofolliculitis barbae, and acne keloidalis - deeper, more scarring follicular disease
- Overview of deep folliculitis
- Sycosis: definition and forms
- Forms of sycosis
- Mycotic sycosis of the upper lip
- Pseudofolliculitis barbae: introduction
- Pseudofolliculitis barbae: epidemiology
- Pseudofolliculitis barbae: pathogenesis
- How a shaved curled hair re-enters the skin
- Pseudofolliculitis barbae of the beard
- Pseudofolliculitis barbae in women
- Pseudofolliculitis barbae: clinical course and pathology
- Pseudofolliculitis barbae: differential diagnosis
- Pseudofolliculitis barbae: treatment overview
- Therapeutic approach to pseudofolliculitis barbae
- Therapeutic approach to pseudofolliculitis barbae (continued)
- Therapeutic approach to pseudofolliculitis barbae (continued)
- Pseudofolliculitis barbae: laser and other treatments
- Acne keloidalis: introduction
- Acne keloidalis: history
- Acne keloidalis: epidemiology
- Acne keloidalis: pathogenesis
- Early acne keloidalis of the posterior neck and scalp
- Advanced acne keloidalis with keloidal plaques
- Acne keloidalis: clinical course
- Acne keloidalis: pathology
- Acne keloidalis: differential diagnosis
- Acne keloidalis: general treatment principles
- Therapeutic interventions for acne keloidalis
- Therapeutic interventions for acne keloidalis (continued)
- Acne keloidalis: surgical and laser options
Follicular Occlusion Tetrad and Hidradenitis Suppurativa
Four related disorders of follicular occlusion, and a close look at their major member
- The follicular occlusion tetrad
- Pilonidal sinus
- Hidradenitis suppurativa: introduction
- Hidradenitis suppurativa: history
- Hidradenitis suppurativa: epidemiology
- Hidradenitis suppurativa: what drives it
- Hidradenitis suppurativa: immune dysregulation
- Hidradenitis suppurativa: genetics
- Genes linked to nonsyndromic hidradenitis suppurativa
- Nonsyndromic hidradenitis suppurativa - associated genes
- Hidradenitis suppurativa: epigenetics and microbiome
- Hidradenitis suppurativa: hormonal factors
- Syndromic hidradenitis suppurativa
- Syndromic hidradenitis suppurativa and genetic disorders where HS can be a finding
- Syndromic hidradenitis suppurativa and genetic disorders where HS can be a finding (continued)
- Syndromic hidradenitis suppurativa and genetic disorders where HS can be a finding (continued)
- Hidradenitis suppurativa: typical lesions
- Hidradenitis suppurativa: clinical spectrum
- Hidradenitis suppurativa: chronic course and complications
- Comorbidities in hidradenitis suppurativa
- Comorbidities in patients with hidradenitis suppurativa
- Staging hidradenitis suppurativa
- Three major grading systems for hidradenitis suppurativa
- Hurley stage I
- Hurley stage II
- Hurley stage III
- Hidradenitis suppurativa: pathology
- Hidradenitis suppurativa: differential diagnosis
- Hidradenitis suppurativa: treatment approach
- Hidradenitis suppurativa therapeutic ladder
- Hidradenitis suppurativa: additional therapies
- Key takeaways
References
Works cited in this chapter
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- Dermatology, 5th Edition (2-Volume Set)