OnExam

  • Skin lesions appear after experiencing trauma
  • Seen in various conditions including vitiligo, psoriasis, lichen planus (causes are secondary to scratching)
  • Named after German dermatologist Koebner

References

  1. Bickley L, Hoekelman R. Bates’ Guide to Physical Examination and History Taking. Philadephia, Pa: Lippincott; 2009.