PURPOSE The objective of this paper is to analyze the structure of the ureter in normal and anencephalic human fetuses. MATERIALS AND METHODS We studied 16 ureters from 8 human fetuses without congenital anomalies aged 16 to 27 weeks post-conception (WPC) and 14 ureters from 7 anencephalic fetuses aged 19 to 33 WPC. The ureters were dissected and embedded in paraffin, from which 5 μm thick se...

Mutation or loss of collagen VI has been linked to a variety of musculoskeletal abnormalities, particularly muscular dystrophies, tissue ossification and/or fibrosis, and hip osteoarthritis. However, the role of collagen VI in bone and cartilage structure and function in the knee is unknown. In this study, we examined the role of collagen VI in the morphology and physical properties of bone and...

introduction: nowadays the necessity of the existence of a certain width of keratinized gingiva is emphasized upon to maintain periodontal health and prevent soft tissue recession around teeth and dental implants. this study was carried out to compare two gingival graft procedures including connective tissue graft and graft with a combination of collagen sponge with platelet-rich plasma and pla...

In keratoconus, the cornea becomes progressively ectactic resulting in severe visual impairment. Here, we use a combination of videokeratography and synchrotron X-ray diffraction to investigate the relationship between corneal shape and thickness, and the distribution and predominant orientation of stromal fibrillar collagen in five keratoconus corneas. In all but the least advanced case, the t...

AIM To investigate the changes in the extracellular matrix protein expression and the morphology of seminiferous tubules in the testis of 88 azoospermic men. METHODS The patients were of the following categories: (1) 22 cases of Sertoli-cell-only syndrome, (2) 20 cases of spermatogenic arrest, and (3) 46 cases with hypospermatogenesis. Testicular sections were immunohistochemically stained fo...

The ultimate goal in the management of burn wounds is to obtain physiological closure in the shortest period of time. Traditional burn wound management involves cleansing, debridement and provision of a moist environment to encourage the process of natural healing. Hence, an ideal dressing material has to maintain a moist environment, act as a bacterial barrier, and as a medium for free exchang...

The case is reported of a young adult man with collagenous gastritis, an extremely rare disorder with only three case reports in the English literature, who subsequently presented with collagenous colitis. Sequential gastric biopsies showed a notable increase in thickness of the subepithelial collagen band. Ultrastructural study of gastric and rectal mucosa showed the characteristic subepitheli...

Objective- to consider the influence of Aloe vera L fresh gel on healing process histopathologically. Design- Experimental study Animals- Five adult male mixed breed dogs aged 2-4 years Procedures- Eight symmetrical full-thickness wounds were surgically created on the back of all five dogs under general anesthesia and sterile condition. After wound creation, 1 ml fluid containing 10...

Glomerulonephritis was induced in mice by the repeated injection of human glomeruli or purified glomerular basement membrane. The glomerular basement membranes of nephritic animals were observed to develop subepithelial extensions, "spikes." Although normally Type IV collagen is found throughout the full thickness of basement membranes, the "spikes" reacted with antibodies to laminin but not wi...

The case is reported of a young adult man with collagenous gastritis, an extremely rare disorder with only three case reports in the English literature, who subsequently presented with collagenous colitis. Sequential gastric biopsies showed a notable increase in thickness of the subepithelial collagen band. Ultrastructural study of gastric and rectal mucosa showed the characteristic subepitheli...