Zygomatic sialoadenitis (&/or associated zygomatic salivary mucocoele) describes an inflammatory process affecting the zygomatic salivary gland. Potential causes include bacterial infection, immune-mediated inflammation and/or trauma. Clinically, affected patients may display any combination of conjunctivitis, ocular discharge, third eyelid elevation, exophthalmos, globe deviation and/or difficulty opening the mouth. Commonly affected breeds include the Labrador Retriever and Golden Retriever.