True about features of cholecystitis on USG – a) Thick fibrosed gallbladder wallb) Stone impacted at neck of gall bladderc) Perigallbladder halod) Increased vascularity
**Core Concept**
The question tests the understanding of ultrasonography (USG) features of cholecystitis, focusing on the inflammatory changes and complications associated with gallbladder inflammation. Cholecystitis is characterized by **inflammation of the gallbladder**, often due to **gallstones** causing obstruction.
**Why the Correct Answer is Right**
The correct features of cholecystitis on USG include a thickened gallbladder wall, which is often **fibrosed** due to chronic inflammation, and a **stone impacted at the neck of the gallbladder**, which can cause obstruction leading to inflammation. **Perigallbladder halo** or fluid collection is also a sign of inflammation.
**Why Each Wrong Option is Incorrect**
**Option A:** and **Option B:** are partially correct but incomplete without considering the full spectrum of USG findings.
**Option D:** Increased vascularity might be seen in some cases but is not as specific or commonly highlighted as other features.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that USG is highly sensitive for detecting **gallstones** and **gallbladder wall thickening**, which are crucial for diagnosing cholecystitis.
**Correct Answer:** C. a, b, c.