**Question:** All of the following are signs of internal malignancy except –

A. Weight loss
B. Fatigue
C. Abdominal mass
D. Hematuria

**Core Concept:** Malignant tumors, also known as cancer, are abnormal cell growths that can lead to the formation of tumors and potentially spread to other parts of the body. These tumors can cause various signs and symptoms depending on their location and size. Common signs of internal malignancy include weight loss, fatigue, abdominal mass, and hematuria.

**Why the Correct Answer is Right:** Hematuria, or blood in the urine, is not typically considered a sign of internal malignancy. Hematuria can have various causes, including infections, urinary tract stones, and certain medications. While internal malignancies can lead to hematuria, it is not exclusive to this condition, making D the correct answer.

**Why Each Wrong Option is Incorrect:**

A. Weight loss: Weight loss can be a sign of internal malignancy, particularly in cases where the tumor affects digestion or results in anorexia.
B. Fatigue: Fatigue can be a sign of internal malignancy, as cancer can lead to anemia, inflammation, or other factors affecting the patient's energy levels.
C. Abdominal mass: An abdominal mass can be a sign of internal malignancy, particularly when it is palpable or visible.

**Why Option D is Right:** As explained above, hematuria is not specific to internal malignancy and can have various causes. Therefore, D is the correct answer because none of the other options are exclusively associated with other conditions rather than malignancy.

**Why Each Wrong Option is Incorrect:**

A. Weight loss: Weight loss can be a sign of internal malignancy, as mentioned above.
B. Fatigue: Fatigue can be a sign of internal malignancy, particularly in cases of anemia or other factors affecting energy levels.
C. Abdominal mass: An abdominal mass can be a sign of internal malignancy, particularly when it is palpable or visible. However, this option is incorrect because hematuria is not exclusive to internal malignancy and can have various causes.

**Clinical Pearl:** It is essential for medical professionals to consider malignancy as a potential diagnosis when a patient presents with symptoms like weight loss, fatigue, abdominal mass, or hematuria. However, hematuria is not exclusive to internal malignancy, making option D the correct answer. If a patient presents with these symptoms or signs, it is crucial to investigate further to identify the underlying cause, which may include internal malignancy but also other conditions like infections, urinary tract stones, or inflammation.