Differential Diagnosis
(Not all cases are differentiated clearly)
- Mongolian spot
Bruise by abuse
Location
Frequent:
  base of spine,  
  lower back, buttocks
Often:
  shoulders, upper back,
  arms, wrists, legs, ankles,
  lateral abdomen
Rare:
  palms, soles, face, head
Frequent:
  buttocks, face
Often:
  anywhere
Color
Blue, bluish-gray,
bluish-green, blue-black
Color changes over time:
  red-purple
  brownish rust-colored
  fades as healing
  lesions may become
  hemorrhagic or necrotic
Shape Usually irregular and edges are indistinct
Often reflects shape of object used, such as hands or belt
Number
One or several
Usually many
sometimes clustered
mix of various healing stages
Presence
Usually present at birth
Regularly appear after absence, weekends or vacations
General
Normal
Nervous, anxiety, scared,
short stature, taciturn,
undernourishment,
other injuries (black eyes,
burns, humerus fractures,
tibia fractures, ligatures)

Copyright (c)2003 by Hironao NUMABE, M.D., D.M.Sc., Tokyo Medical University. All rights reserved.

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