Okay, let's tackle this question. The patient has peritonitis due to a diverticula perforation with purulent contamination. The question is about Hinchey's staging. I remember Hinchey classification is for diverticulitis, right? So the stages are based on the extent of the perforation and contamination.

Hinchey I is localized purulent peritonitis without phlegmon. Hinchey II is localized with phlegmon. Hinchey III is generalized purulent peritonitis with no fecal contamination. Hinchey IV is generalized with fecal contamination. Wait, the question mentions purulent contamination. So if there's a perforation but the contamination is purulent (not fecal), that would be Hinchey III. But if there's fecal contamination, it's IV.

The patient has peritonitis with purulent contamination. So the correct answer would be Hinchey III. Let me check the options again. The correct answer here is C. Hinchey stage III. The other options would be incorrect because Hinchey I is without phlegmon, II has phlegmon, IV is fecal. So the key is whether the contamination is fecal or purulent. The presence of purulent without fecal points to III. That makes sense. The clinical pearl is to remember that Hinchey IV involves fecal contamination, which is more severe. So the answer is C.

**Core Concept**
Hinchey staging classifies the severity of perforated diverticulitis based on the extent of peritoneal contamination and inflammation. It guides surgical management and prognosis, with higher stages indicating more severe disease.

**Why the Correct Answer is Right**
Hinchey Stage III is defined by generalized purulent peritonitis without fecal contamination. The perforation allows pus to spread into the peritoneal cavity, leading to diffuse inflammation but no free fecal material. This stage requires urgent surgical intervention, typically involving resection and primary anastomosis or temporary diversion. The presence of purulent (not fecal) contamination distinguishes Stage III from Stage IV, which involves fecal peritonitis due to complete perforation and spillage of stool.

**Why Each Wrong Option is Incorrect**
**Option A:** Hinchey Stage I refers to localized purulent peritonitis without phlegmon or abscess formation.
**Option B:** Hinchey Stage II describes localized phlegmon (inflammatory mass) without free perforation.
**Option D:** Hinchey Stage IV involves generalized fecal peritonitis, a more severe form due to direct fecal contamination from a large perforation.

**Clinical Pearl / High-Yield Fact**
Remember: Hinchey stages I–IV progress from localized to generalized disease, with "purulent" (Stage III) vs. "fecal" (Stage IV) contamination being a critical differentiator. Stage IV has the highest mortality and often requires emergency surgery with colostomy.

**Correct Answer: C. Hinchey Stage III**

✓ Correct Answer: C. 3