This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vesiculobullous & Erosive Diseases in the Newborn and Infant, Subject name: Skin
Tzank smear is for - 
Select and explain. 
A. HZV, B. Psittacosis, C. Cryptococcus, D. Ricketssia
A: HZV
Answer: A: HZV 
Explanation: Ans is 'a' i.e., HZV o Tzank smear is done for vesiculobullous disorders.Tzank smear findings in bullous disordersDisordersFindingso PemphigusAcantholysiso Bullous pemphigoidPredominantly eosinophilso Varicella-zoster infectionMultinucleated giant cellso Herpes simpex infectionMultinucleated giant cellso Toxic epidermal necrolysisNecrotic cells