1/4. Bruch's membrane in pseudoxanthoma elasticum. Histochemical, ultrastructural, and x-ray microanalytical study of the membrane and angioid streak areas.In a case of pseudoxanthoma elasticum (PXE), Bruch's membrane was studied histochemically, ultrastructurally and by element analysis. Two kinds of calcifications were observed, one composed of hydroxyapatite and the other of CaHPO4. They were seen in the scar tissue of angioid streak areas and in the membrane outside these areas, respectively. Furthermore, a thready material was found in the membrane as well as an increased amount of acid mucopolysaccharides. The genesis of the calcifications and the pathogenesis of angioid streaks are discussed. The author is in favor of a malformed collagen as the basic defect in PXE.- - - - - - - - - - ranking = 1keywords = angioid streak, angioid, streak (Clic here for more details about this article) |
2/4. Siegrist's streaks in hypertensive choroidopathy.The retinal and choroidal vasculatures are supplied by different systems of blood vessels, each having distinct anatomic and physiologic properties. In response to systemic hypertension, tissues supplied by each of these vascular systems of the eye are affected differently and reveal different manifestations. Siegrist's streaks are sequelae of hypertensive choroidopathy, associated with acute systemic hypertension, generally indicative of a poor prognosis for patients presenting with them. A case report of this uncommon clinical condition is described along with a discussion of the associated hisopathology to allow for a better understanding of how the eyes may change secondary to systemic vascular disease.- - - - - - - - - - ranking = 0.018992795499147keywords = streak (Clic here for more details about this article) |
3/4. Calcification of Bruch's membrane in angioid streaks with homozygous sickle cell disease.Histochemical and light and electron microscopic studies of two eyes of a patient with homozygous sickle cell disease and angioid streaks demonstrated heavy calcification and breaks in Bruch's membrane. We were unable to demonstrate iron deposition by histochemical techniques or transmission electron microscopy. These studies suggest that calcification rather than iron deposition is the major factor leading to brittleness of Bruch's membrane in patients with hemolytic anemia and angioid streaks.- - - - - - - - - - ranking = 1keywords = angioid streak, angioid, streak (Clic here for more details about this article) |
4/4. Leukemic iris infiltration.A 7-year-old boy with acute lymphocytic leukemia developed iris infiltration, blood-streaked hypopyon, and high intraocular pressure. A diagnostic anterior chamber paracentesis was performed, which provided a cytologic diagnosis. The aspirate was studied by both the millipore filter technique with Papanicolaou stain and a dried smear using the Wright's stain. Wright's stain provided more distinct cellular details. Irradiation of the anterior segment resulted in clearing of leukemic iris infiltration, hypopyon, and glaucoma.- - - - - - - - - - ranking = 0.0037985590998293keywords = streak (Clic here for more details about this article) |