**Core Concept:** Malignant otitis externa (MOE) is a severe form of otitis externa (ear outer infection) caused by Pseudomonas aeruginosa. It typically affects diabetics and elderly patients due to compromised immunity. The infection spreads from the ear canal to the temporal bone, leading to skull erosion and intracranial spread.

**Why the Correct Answer is Right:** Option C is incorrect because malignant otitis externa (MOE) is a severe form of otitis externa caused by Pseudomonas aeruginosa. It is a life-threatening infection that affects diabetics and elderly patients due to impaired immunity. The infection spreads from the ear canal to the temporal bone, causing skull erosion and potentially leading to intracranial spread.

**Why Each Wrong Option is Incorrect:**

A. **Option A (Temporal Bone Involvement):** While MOE does involve the temporal bone, this does not make it false. Temporal bone involvement is a characteristic feature of malignant otitis externa.

B. **Option B (Intracranial Spread):** Although malignant otitis externa has the potential to spread intracranially, this does not make the statement false. MOE can lead to serious complications if not promptly diagnosed and treated.

D. **Option D (Infection Caused by Candida):** Malignant otitis externa is caused by Pseudomonas aeruginosa, not Candida. Candida infections are less severe and typically affect immunocompetent individuals.

**Clinical Pearl:** Early diagnosis and prompt treatment are crucial in managing malignant otitis externa due to its potential to cause life-threatening complications. In diabetic patients or elderly individuals with impaired immunity, a severe otitis externa should raise suspicion for MOE.