Hairpin shaped eosinophilic structure present in radicular cyst is:: (A) Rushton bodies, (B) Russell bodies, (C) Both of the above, (D) None of the above
Answer is A. Periapical Cyst 
The cyst lumen may be filled with fluid and cellular debris. On occasion, the lining epithelium may demonstrate linear or arch-shaped calcifications known as Rushton bodies 
Squamous epithelial cyst lining exhibiting numerous irregular and curvilinear Rushton bodies.