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Spot Skin Diagnoses (Erythema Nodosum (Extras (Parotid swelling:…

- - - - Commonly found on shins
        Can be anywhere w/ SC fat
        Older lesions leave a bruise
  - - - Systemic disease
        
        Sarcoidosis
        
        IBD
        
        Behcet’s
      - Infection
        
        Streptococcal infection
        
        TB
      - Drugs
        
        Sulphonamides
        
        OCP
- - - - Infections
        
        HSV (70%)
        
        Mycoplasma
      - Drugs
        
        Sulfonamides
        
        NSAIDs
        
        Allopurinol
        
        Penicillin
        
        Phenytoin
- - - - Autosomal dominant
        
        Multiple telangiectasias
        
        AVMs
        
        Lungs
        
        Liver
        
        Brain
    - - Haemorrhage
        
        Epistaxis
        
        GI haemorrhage
        
        Haemoptysis
        
        SAH
      - High output cardiac failure
      - May have ↑ risk of CRC if SMAD4 mutation
- - - - Autosomal dominant mutation of STK11 gene on Chr 19
      - Mucocutaneous macules
      - GI hamartomatous polyps
    - - GI hamartomas
        
        Intussusception
        
        GI bleeding
      - Pancreatic endocrine tumours
      - ↑ risk of cancer: esp. CRC (~20% life-time risk)