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A 40yo man presents with vomiting for the past 2 days. (Non-GI (CNS (↑ICP,…

- - - - Hx: Rapid onset of severe vertigo with N/V
      - PE: Nystagmus, Positive head thrust test, Gait instability.
    - - Causes: Mass, Hydrocephalus, Abcess, Infarct, Hemorrhage
      - Hx: Early morning headache with N/V. Gets better along the day with supine posture. Diplopia. Loss of coordination, balance.
      - PE: Papilledema. Bradycardia. ↓RR. HTN. Focal neurological signs.
    - - Hx: High fever, Nuchal Rigidity, Altered mental status
      - PE: Kernig, Brudzinsk
    - - Hx: Pulsatile headache, Photophobia, Phonophobia, Preceding aura, Family hx of migraines
- - - - Causative Agents: Norovirus, Rotavirus, Adenovirus, Astrovirus
      - Hx: N/V, Diarrhea (≥3x/day), Fever, Abdo pain. Might have sore throat, cough, rhinorrhea, weight loss, fatigue.
      - PE: Mild diffuse abd tenderness on palpation, Guarding. Look out for severe dehydration (Dry mucus membrane, ↓Skin tugor), Tachycardia, Hypotension, Altered mental status.
    - - Hx: Abdo pain (Steady, severe RUQ, May radiate to R shoulder/back, Aggravated by moving), N/V, Fever, Anorexia. Fatty food ingestion 1h prior to onset.
      - PE: Tachycardia, Guarding, Positive Murphy's sign.
    - - Causative Agents: Salmonella, Campylobacter, S. aureus (1-6h), Bacillus cereus (1-6h)
      - Hx: N/V, Diarrhea, Fever, Abdo pain
    - - Hx: Heartburn, Sour taste in mouth, abdo pain worse after eating