Papules and nodules

Papules and nodules is a topic covered in the Diagnosaurus.

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DDx

Skin-colored, white, or yellow

  • Skin tag (acrochordon)
  • Warts
  • Basal cell carcinoma
  • Squamous cell carcinoma
  • Sebaceous (epidermal inclusion) cyst
  • Lipoma
  • Xanthoma
  • Molluscum contagiosum
  • Nevus (intradermal)
  • Sebaceous hyperplasia
  • Milia
  • Keratosis pilaris
  • Granuloma annulare
  • Rheumatoid nodules
  • Gout
  • Sarcoidosis
  • Calcinosis cutis
  • Metastases (color variable)
  • Calluses or corns
  • Gummas (tertiary syphilis)
  • Sporotrichosis
  • Foreign-body granuloma
Brown
  • Seborrheic keratosis
  • Nevus (compound, intradermal)
  • Melanoma
  • Dermatofibroma
  • Neurofibroma
Red
  • Insect bites
  • Acne vulgaris
  • Cherry angioma
  • Hemangioma
  • Folliculitis
  • Inflamed sebaceous (epidermal inclusion) cyst
  • Furuncle
  • Scabies
  • Erythema nodosum
  • Basal cell carcinoma
  • Keratoacanthoma
  • Prurigo nodularis
  • Miliaria (heat rash)
  • Urticaria
  • Sporotrichosis
Blue, violaceous, or purple
  • Vasculitis (palpable purpura)
  • Lichen planus
  • Melanoma
  • Kaposi's sarcoma
  • Blue nevus
  • Venous lake
  • Mycosis fungoides (cutaneous T cell lymphoma)
  • Endocarditis (Osler's nodes)

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Last updated: December 1, 2014