Question

Chylous ascites is caused by all of the following except:

• A. Colloid carcinoma of stomach.
• B. Tuberculosis.
• C. Trauma.
• D. Nephrotic syndrome.

Hint:

True chylous ascites needs lymphatic blockage; mucinous gastric cancer instead gives gelatinous fluid.

Answer 1

The Correct Option is A

Chylous ascites is a milky, fat rich fluid that builds up when lymph carrying digested fat leaks out of blocked or damaged lymphatic channels into the peritoneal cavity. The question asks which of four options is NOT a standard cause of this condition.

1. Colloid carcinoma of stomach: this mucinous tumor spreads over the peritoneum and produces a thick, gelatinous, mucin filled fluid, closer to what is seen in pseudomyxoma peritonei, rather than the lipid rich milky fluid of true chylous ascites, so it does not classically cause chylous ascites.
2. Tuberculosis: TB can infect and block mesenteric lymph nodes, backing up chyle into the peritoneal space, a well known cause of chylous ascites.
3. Trauma: injury or surgery near the cisterna chyli or major lymphatic trunks can tear them open, letting chyle spill directly into the abdomen.
4. Nephrotic syndrome: though less common, lymphatic abnormalities linked with nephrotic syndrome are accepted as a cause of chylous ascites.

Three of the four options damage or block true lymphatic/chyle carrying channels, giving the classic milky fluid, while colloid carcinoma of the stomach instead produces a mucin rich fluid through peritoneal spread, a different process altogether.

Let's summarize:

• True chylous ascites needs lymphatic blockage or injury, as seen with TB, trauma and nephrotic syndrome.
• Colloid (mucinous) gastric carcinoma instead produces a mucinous, gelatinous ascitic fluid, not classic chyle.

So the exception, the one not causing true chylous ascites, is colloid carcinoma of the stomach.