Haemochromatosis affects all of the following organs Except
**Core Concept**
Haemochromatosis is a genetic disorder characterized by excessive iron accumulation in the body, leading to tissue damage and organ dysfunction. This condition is caused by mutations in the HFE gene, resulting in increased intestinal iron absorption and reduced iron export from the liver. As a result, iron deposits accumulate in various organs, causing cellular damage and functional impairment.
**Why the Correct Answer is Right**
The correct answer is a list of organs affected by haemochromatosis. These organs include:
* **Liver**: Iron accumulation in the liver can lead to liver cirrhosis, fibrosis, and even hepatocellular carcinoma.
* **Pancreas**: Iron deposition in the pancreas can cause diabetes mellitus, a common complication of haemochromatosis.
* **Skin**: Iron overload can cause skin pigmentation changes, including a bronze or grayish discoloration.
* **Heart**: Iron accumulation in the heart can lead to cardiomyopathy, arrhythmias, and even heart failure.
* **Joints**: Iron deposition in the joints can cause arthritis, leading to pain and mobility issues.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a known organ affected by haemochromatosis.
**Option B:** This option is incorrect because it is not a commonly affected organ in haemochromatosis.
**Option C:** This option is incorrect because it is not typically associated with haemochromatosis.
**Clinical Pearl / High-Yield Fact**
Remember that haemochromatosis can also affect the pituitary gland, leading to hypogonadism, hypothyroidism, and other endocrine disorders. This is a high-yield fact for medical students and physicians to remember when evaluating patients with haemochromatosis.
**Correct Answer:** D