III. Causes: Neuropathy

  1. Herpes Zoster
  2. Mononeuritis multiplex
    1. Vasculitis
    2. Diabetes Mellitus (Diabetic Radiculopathy)
      1. Severe nerve root T6 to T12 truncal pain
  3. Nerve root compression or impingement
    1. Spinal level T7 to L1 Nerve Roots
    2. Ilioinguinal nerve root entrapment
    3. Rectus abdominis nerve root entrapment
      1. Anterior cutaneous branches of intercostal nerves
      2. Lateral cutaneous branches of intercostal nerves
      3. Anterior cutaneous branch of subcostal nerve
    4. Nerve root entrapment after Inguinal Hernia repair
      1. Lateral cutaneous branches of subcostal nerve
      2. Lateral cutaneous branch of iliohypogastric nerve

IV. Causes: Musculoskeletal Injury and Trauma

  1. Abdominal Trauma or athletic injury
    1. Myofascial injury
    2. Rectus abdominis rupture
    3. Abdominal wall hematoma (post-laparoscopy)
    4. Idiopathic intraabdominal adhesions
  2. Surgical scar related changes
    1. Neuroma formation
    2. Recurrent Endometriosis
  3. Slipping Rib Syndrome (Ribs 8 to 10)
    1. Sharp, stabbing upper Abdominal Pain
    2. Diagnose by eliciting pain with hooking maneuver

V. Causes: Miscellaneous

  1. Desmoid tumor
    1. Dysplastic tumor often in young women
  2. Spider Bite
  3. Infection
    1. Trichinosis
    2. Abdominal wall abscess

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