III. Causes: Malignant Tumors

  1. External Ear
    1. Squamous Cell Carcinoma (66%)
      1. Treated with surgical resection
      2. Good prognosis
    2. Basal Cell Carcinoma (33%)
      1. Treated with surgical resection
      2. Excellent prognosis
  2. Middle Ear: Squamous Cell Carcinoma (most common tumor)
    1. Treated with surgical resection
    2. Prognosis guarded to poor
    3. Outcome depends on local extension
      1. Temporal Bone
      2. Petrous bones

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