Focal fibrosis in a left SMG. The parenchyma is partially hypoechoic changed. In contrast to any tumor-like or tumorous lesions, the tissue structure is not changed. The perfusion pattern is regular and not different to the pathological and or the residual uninvolved gland. Abbreviations: SMG, submandibular gland; MHM, mylohyoid muscle; Tong, tongue; Tons, tonsil; WD, Wharton’s duct; FA, facial artery; FS, focal sialadenitis.