Grisel&;s syndrome is: (A) Glucosaminidase deficiency, (B) Atlanto-axial joint dislocation, (C) Hexosaminidase deficiency, (D) L4-L5 displacement
Answer is B. Grisel's syndromeSpontaneous subluxation of the atlantoaxial joint following peri-pharyngeal inflammation is known as Grisel's syndrome Children are most frequently affected and classically have toicollis associated with neck stiffness or pain upon neck movement(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 3297, 3298)