Polishing produces some specular reflection, but the remaining light continues to be diffusely reflected. In this disorder, both parotid glands may be diffusely enlarged with only modest symptoms. Pulmonary angiography may reveal diffusely fine or blotchy vascular configuration. These antibodies show a diffusely granular, cytoplasmic staining pattern under microscopy. Plants of the genus "Calligonum" are shrubs, diffusely but irregularly branched, with flexuous woody branches. The bone marrow in a typical case is hypercellular and diffusely fibrotic. High-grade gliomas are highly vascular tumors and have a tendency to infiltrate diffusely. With age, these lesions may calcify and appear as diffusely minute spots or stippled. In later stages of constipation, the abdomen may become distended, hard and diffusely tender. The diffusely branched stems tend to root at the basal nodes. Generalized seizures arise diffusely and simultaneously from both hemispheres of the brain. In conventional imaging, this diffusely scattered light contributes background that obscures an image. By nature, these tumors invade diffusely throughout the brain stem, growing between normal nerve cells. Lambertian reflectance is the property that defines an ideal "matte" or diffusely reflecting surface. Conventional Raman spectroscopy is limited to the near-surface of diffusely scattering objects.