BACKGROUND We classified iatrogenic retinal break formation during 20-gauge pars plana vitrectomy for proliferative diabetic retinopathy into three types according to the mechanism of development, and evaluated the association of each type with postoperative complications. This is the largest series of such patients published to date. METHODS This was a retrospective comparative study of 760 ...

inorganic polyphosphates (polyp) are linear polymers of few to several hundred orthophosphate residues, linked by energy-rich phosphoanhydride bonds. four isolates had been screened from soil sample. by maldi-tof analysis, they were identified as bacillius cereus, acinetobacter towneri, b. megaterium and b. cereus. the production of polyp in four isolates was studied in phosphate uptake medium ...

PURPOSE To investigate the matrix metalloproteinase (MMP) species and their activation associated with the pathogenesis of proliferative diabetic retinopathy (PDR). METHODS Sandwich enzyme immunoassays were used to measure concentrations of MMP-1, -2, -3, -7, -8, -9, and -13 in vitreous samples from patients with PDR and nondiabetic vitreoretinal diseases. To evaluate activation ratios of the...

choanal polyps are a form of nasal polyps that grow toward the choana with a single stalk. septochoanal polyp is a rare entity that originates from the mucosa of the nasal septum with choanal extension. the most common site of its origin is mainly the superior aspect of the posterior portion of the nasal septum. however, metaplastic ossification is a rare event in nasal polyp and to the best of...

Background: Nasal polyps, a common clinical problem, are characterized by eosinophilic and mast cell inflammation.  The role of allergy and IgE in pathogenesis of nasal polyps is still unclear.  IgE receptors are important components of the immunological pathway in allergic and inflammatory diseases. Objective: To determine if the low affinity IgE receptor (CD23) is presented on nasal polyp tis...

Dear Editor: Colonoscopy was performed to a 65-year-old female with tenesmus that showed, in the distal rectum, a bulging lesion of 3 cm covered with normal appearance mucosa. We performed an endoscopic ultrasonography (EUS) that showed a polypoid morphology lesion, heterogeneous, mainly hypoechoic, located in the deep mucosa and submucosa layers; the lesion was well delimited with regular bord...

A 57-year-old woman was referred to the University of Michigan Hospital in July 1984 for evaluation of iron deficiency anemia. She was transfused with five units of blood and then underwent complete evaluation of her gastrointestinal tract. During double contrast examination of her upper gastrointestinal tract a 2.0 x 1.3 cm lobulated well demarcated polypoid lesion was found in the mid esophag...