In the dog case, which condition was explicitly listed as a differential diagnosis for the skin issue?

• A. Flea allergy dermatitis
• B. Surface pyoderma
• C. Dermatophytosis
• D. Allergic otitis

Answer: (A)

When a case lists a condition as a differential diagnosis for the skin problem, that specific condition is the best choice because it matches what the clinician considered as a possible cause. In this dog case, fleas allergy dermatitis was explicitly named as a differential for the skin issue, so it is the correct option. The other conditions—surface pyoderma, dermatophytosis, and allergic otitis—are common canine skin concerns, but they weren’t stated as differential diagnoses in this scenario, so they aren’t the best answer here. This emphasizes reading the case notes as the clinician’s stated possibilities, rather than relying on general likelihood alone.