Elongated secretory endpieces have a much wider lumen than the parotid. The round basally located nuclei of these pyramidal cells are typical of serous cells though the apical secretory product is more mucinous. Myoepithelial cells are within the basement membrane. Intralobular ducts are lined by epithelia which range from simple cuboidal to columnar and may be difficult to distinguish from secretory endpieces.
Plasma cells are frequent in the ct.