The causes for rejection for appointment, enlistment, and induction (without an approved waiver) are an authenticated history of:
Current symptomatic cervical ribs (756.2) are disqualifying.
Current or history of congenital cysts (744.4) of branchial cleft origin or those developing from remnants of the thyroglossal duct, with or without fistulous tracts, is disqualifying.
Current contraction (723) of the muscles of the neck, spastic or non-spastic, or cicatricial contracture of the neck, to the extent that it interferes with the proper wearing of a uniform or military equipment or is so disfiguring as to interfere with or prevent satisfactory performance of military duty, is disqualifying.
Derived from Department of Defense (DOD) Directive 6130.3, "Physical Standards for Appointment, Enlistment, and Induction," and DOD Instruction 6130.4, "Criteria and Procedure Requirements for Physical Standards for Appointment, Enlistment, or Induction in the Armed Forces."