This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Gilchrist disease is: 
Select and explain. 
A. North American Blastomycosis, B. South American Blastomycosis, C. Australian Blastomycosis, D. None
A: North American Blastomycosis
Answer: A: North American Blastomycosis 
Explanation: North American Blastomycosis: Gilchrist’s disease.
NORTH AMERICAN BLASTOMYCOSIS
(Gilchrist Disease) 
North American blastomycosis is a mycotic infection caused by Blastomyces dermatitidis and may occur either in a cutaneous form or in a systemic form involving bones, liver, lungs, subcutaneous tissues and other organs.
Reference: Shafer’s Textbook of ORAL PATHOLOGY Eighth Edition page no 351,352