This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Salivary Gland, Subject name: Surgery
In which one of the following conditions the sialograph is contraindicated? 
Select and explain. 
A. Ductal calculus, B. Chronic parotitis, C. Acute parotitis, D. Recurrent sialadenitis
C: Acute parotitis
Answer: C: Acute parotitis 
Explanation: Ans. (c) Acute parotitisRef Bailey 25/e p755Sialography:* Contrast Examination of Salivary glands and DuctsIndication:* Salivary gland stones and stricture* Chronic Sialadenitis* Tumors of salivary glands* Contraindication:* Allergy to contrast* Acute Sialadenitis