Cutaneous manifestations of systemic disease
Dermatology, Venereology and Leprosy · MBBS
Study notes
Velvety dark neck — acanthosis nigricans; diabetes; check glucose. Cutaneous systemic: diabetes (acanthosis nigricans — insulin resistance; necrobiosis lipoidica — shins; infections), thyroid (pretibial myxedema — Graves; vitiligo — Hashimoto), liver (spider angioma, palmar erythema, jaundice), kidney (uremic frost, half-and-half nails), lupus (malar rash — photosensitive), paraneoplastic (acanthosis — gastric; Leser-Trelat — seborrheic keratoses — GI). The velvety neck is acanthosis — check sugar.
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
- Psoriasis and papulosquamous disorders
- Acne, rosacea, pigmentary disorders — vitiligo, melasma