II. Definition

  1. Thinning of skull outer table

III. Signs

  1. Press firmly over occiput or Parietal Bones
  2. Gives-way as if pressing on ping-pong ball

IV. Differential Diagnosis

  1. Rickets
  2. Osteogenesis imperfecta
  3. Hydrocephalus
  4. Normal variant
    1. May be present in newborns
    2. Resolves by 1 month of age
    3. May persist normally at Suture lines

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