Psoriasis and papulosquamous disorders
Dermatology, Venereology and Leprosy · MBBS
Study notes
Silvery scaly plaques on elbows — psoriasis; Auspitz positive; topical + methotrexate. Psoriasis (silvery scales — extensor — elbows/knees: Auspitz — pinpoint bleeding; Koebner — trauma: treat — topical steroids + vitamin D; phototherapy; systemic — methotrexate, cyclosporine; biologics — anti-TNF/IL-17: arthritis — DIP, nails — screen): pityriasis rosea (herald patch → Christmas tree — self-limiting), lichen planus (violaceous polygonal papules — wrists — Wickham striae — oral — biopsy). The silvery scale is psoriasis — Auspitz confirms.
Related topics
- Bacterial skin infections: impetigo, cellulitis, folliculitis
- Viral skin infections: warts, herpes, molluscum
- Fungal infections: dermatophytosis, candidiasis, pityriasis versicolor
- Eczema and dermatitis: atopic, contact, seborrheic
- Acne, rosacea, pigmentary disorders — vitiligo, melasma
- Hair disorders: alopecia; nail disorders