Which cancer types had an intermediate prevalence of weight loss at diagnosis?

• A. Sarcomas, breast and hematologic
• B. Ovarian and pancreatic
• C. Prostate, colon and lung
• D. Pancreatic and gastric

Answer: (C)

Weight loss at diagnosis reflects how aggressively a cancer drives systemic changes and affects appetite and metabolism. Some cancers tend to provoke cachexia and weight loss more often right from the start, while others cause it less frequently.

Prostate cancer typically presents with few constitutional symptoms early, so weight loss is not a dominant feature there. Colon cancer can cause weight loss, especially when disease is advanced or symptoms like obstruction are present, but it isn’t universally present at diagnosis. Lung cancer often has weight loss due to tumor burden and systemic inflammation, but not in every case at the moment of diagnosis. Taken together, these cancers are more likely to show weight loss at diagnosis than cancers with very low prevalence, yet they’re not as consistently associated with weight loss as the cancers known for high rates (like pancreatic or gastric). That’s why this trio is considered to have an intermediate prevalence.

In practice, recognizing this helps guide nutrition screening and early intervention, since weight loss at diagnosis signals higher risk for cachexia and metabolic complications, influencing how aggressively to pursue nutritional support.