Weight Loss

 

Aetiology of weight loss

  • Appetite maintained:
    • DM,
    • Hyperthyroidism
    • Malabsorption
    • Phaeochromocytoma
  • Appetite suppressed:
    • Malignancy
    • Severe cardio or respiratory failure
    • Gut failure
    • Depression
    • HIV

 

History in weight loss

  • History of presenting complaint
    o Amount and duration of weight loss
    o Any intentional weight loss?
    o Dietary changes
    o Calorie intake
    o ALARMS symptoms (see Dysphagia) and other cancer red flags
    o Full systems review
    o Systemic symptoms – night sweats
    o Psychological history – number of diets, any previous eating disorders, weight fluctuations
  • Past medical history
    o See list of causes
  • Medications
    o Appetite suppressants (including over-the-counter drugs)
  • Family history
    o Cancer
    o Eating disorders
  • Social history
    o Smoking
    o Travel history
    o Risk factors for HIV

 

Examination of weight loss

  • Cachexia
  • Lymphadenopathy
  • Abdominal masses
  • Evidence of cardio or respiratory failure
  • Signs of hyperthyroidism

 

Initial management of weight loss

  • Subjective global assessment
  • Skin fold thickness
  • BMI
  • Blood tests:
    • FBC, U&E, LFT, TFT, clotting (for vitamin K)
    • B12, vitamin D
    • Cortisol and SST
    • Tumour markers
    • Coeliac antibodies
  • Treat cause

 

Further management of weight loss

  • If feeding supplementation needed then start with oral route if GIT working
    o Give thiamine first (to prevent refeeding syndrome)
  • Watch for refeeding
  • Parenteral nutrition

 

 

Click here for medical student OSCE and PACES questions about Weight Loss

Common Weight Loss exam questions for medical students, finals, OSCEs and MRCP PACES

 

Click here to download free teaching notes on Weight Loss: Presentation-Weight Loss

Perfect revision for medical students, finals, OSCEs and MRCP PACES