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Cancer Cachexia

Hypercatabolic wasting syndrome with progressive weight loss and reduced quality of life.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Onkoloji department. Book Appointment →

What is Cancer Cachexia?

Cancer cachexia is a multifactorial syndrome characterized by ongoing loss of skeletal muscle mass with or without loss of fat mass that cannot be fully reversed by conventional nutritional support and leads to progressive functional impairment. International consensus defines it as weight loss greater than 5% over 6 months, or weight loss greater than 2% with BMI less than 20 kg/m², or sarcopenia plus weight loss greater than 2%.

Pathophysiology involves systemic inflammation (IL-6, TNF-alpha, IL-1), tumor-derived factors (PIF, lipid mobilizing factor), neuroendocrine dysregulation, increased energy expenditure, and anorexia. Activation of muscle proteolysis (ubiquitin-proteasome, autophagy) and lipolysis combined with reduced anabolism produces relentless wasting that does not respond to caloric increase alone.

Cachexia progresses through pre-cachexia, cachexia, and refractory cachexia stages. It is most prevalent in advanced gastrointestinal, lung, pancreatic, and head/neck cancers, affecting up to 80% of patients with advanced disease and contributing to 20% of cancer deaths. Multimodal management combining nutrition, exercise, anti-inflammatory measures, and selective pharmacotherapy is the standard of care.

Symptoms

Unintentional weight loss exceeding 5% over 6 months
Loss of skeletal muscle mass and strength
Reduced grip strength on dynamometry
Sarcopenic body composition on imaging
Persistent anorexia, early satiety
Fatigue and weakness disproportionate to disease
Functional decline (gait speed, sit-to-stand)
Reduced exercise tolerance
Anemia and elevated inflammatory markers
Hypoalbuminemia
Edema in late stages
Increased treatment toxicity
Reduced quality of life and psychological distress
Caregiver distress

Risk Factors

Advanced gastrointestinal cancer (pancreatic, gastric, esophageal)
Lung cancer
Head and neck cancer
Older age
Sarcopenic baseline body composition
Elevated systemic inflammation (CRP, NLR)
Chemotherapy-induced toxicity
Inadequate caloric and protein intake
Sedentary lifestyle
Comorbid heart failure, COPD, CKD
Depression

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Weight loss greater than 5% in 6 months
  • BMI less than 20 with ongoing loss
  • Marked muscle wasting and weakness
  • Severe anorexia not responding to symptom management
  • Functional decline interfering with treatment
  • Treatment dose reductions or delays
  • Dehydration or refeeding risk
  • Family concerns about declining oral intake
  • Need for advanced care planning
  • Refractory cachexia in advanced disease

Treatment Methods

01
Early identification with screening at every clinical visit
02
Stage cachexia: pre-cachexia, cachexia, refractory cachexia
03
Comprehensive multidisciplinary assessment (oncology, nutrition, rehabilitation, palliative)
04
Body composition imaging (CT muscle area at L3, BIA)
05
Treat reversible causes: dysphagia, mucositis, depression, pain, constipation
06
Energy 25-30 kcal/kg/day, protein 1.2-1.5 g/kg/day where tolerated
07
Oral nutritional supplements with EPA-enriched formulas
08
Enteral feeding when oral intake inadequate and prognosis allows
09
Resistance training plus aerobic exercise tailored to performance status
10
Anamorelin (selective ghrelin agonist, where approved)
11
Megestrol acetate for appetite stimulation (caution VTE, adrenal suppression)
12
Short-course corticosteroids (1-3 weeks) for symptomatic relief
13
Olanzapine low-dose for anorexia and nausea
14
Cannabinoid trial in selected patients
15
Anti-inflammatory and anti-IL-6 strategies (clinical trials)
16
Manage symptoms: antiemetics, prokinetics, taste modulators, mouth care
17
Treat underlying cancer when feasible (cachexia is partly tumor-driven)
18
Psychosocial support for patient and family
19
Palliative care integration early in advanced disease
20
Goals-of-care discussions in refractory cachexia

Which Department to Visit?

You can visit our Onkoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.