Changes

*Initially '''painful swelling''' evolving to a '''non-painful, enlarging, fluctuant mass''', usually in the cervical region.

*Initially '''painful swelling''' evolving to a '''non-painful, enlarging, fluctuant mass''', usually in the cervical region.

*Mucocoeles originating from the '''zygomatic gland''' may cause exophthalmus or strabismus if they impinge on the orbit.

*Mucocoeles originating from the '''zygomatic gland''' may cause exophthalmus or strabismus if they impinge on the orbit.

*If the structure becomes infected, '''pain''' and typical signs of infectons ('''pyrexia, depression and anorexia''') may be observed.

*If the structure becomes infected, '''pain''' and typical signs of infections ('''pyrexia, depression and anorexia''') may be observed.

===Laboratory Tests===

===Laboratory Tests===

A definitive diagnosis relies on '''fine needle aspiration''' of the structure and cytological examination of the fluid obtained.  Typically, this reveals yellow/amber mucoid or blood-tinged material with evidence of mild inflammation.  Periodic acid Schiff (PAS) staining may be used to detect mucus in the fluid.   

A definitive diagnosis relies on '''fine needle aspiration''' of the structure and cytological examination of the fluid obtained.  Typically, this reveals yellow/amber mucoid or blood-tinged material with evidence of mild inflammation.  Periodic Acid Schiff (PAS) staining may be used to detect mucus in the fluid.   

===Diagnostic Imaging===

===Diagnostic Imaging===