True about mesenteric vein thrombosisa) Peritoneal signs always presentb) Thrombobectomy is always donec) Heparin is givend) Surgery can lead to short bowel synd.

**Core Concept**
Mesenteric vein thrombosis is a condition where a blood clot forms in the veins that drain blood from the intestines, which can lead to bowel ischemia and potentially severe complications. This condition involves the **mesenteric venous system**, including the **superior mesenteric vein** and **portal vein**. Understanding the **pathophysiology of venous thrombosis** is crucial for diagnosis and management.

**Why the Correct Answer is Right**
The correct answer, **c) Heparin is given**, is right because anticoagulation with heparin is a standard treatment for mesenteric vein thrombosis to prevent further clot formation and promote recanalization of the affected vein. This approach is aimed at reducing the risk of bowel infarction and other complications. The use of heparin is based on the **principle of anticoagulation** in venous thromboembolism.

**Why Each Wrong Option is Incorrect**
**Option A:** Peritoneal signs are not always present in the early stages of mesenteric vein thrombosis, and their absence does not rule out the diagnosis.
**Option B:** Thrombectomy is not always done, as the decision to perform surgery depends on the severity of the condition and the presence of complications like bowel infarction.
**Option D:** While surgery can be necessary in some cases, such as when there is bowel infarction, it does not always lead to short bowel syndrome, although this is a potential complication.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that mesenteric vein thrombosis can present with non-specific abdominal pain, and a high index of suspicion is required for early diagnosis. **Anticoagulation** is a cornerstone of treatment, and **imaging studies** like CT scans are crucial for diagnosis.

**Correct Answer:** C. Heparin is given