Download presentation
Presentation is loading. Please wait.
Published byVít Bartoš Modified over 5 years ago
1
Inst. Pathol. ,1st Med. Faculty, Charles Univ., Prague
Pathology of Mucin Jaroslava Dušková Inst. Pathol. ,1st Med. Faculty, Charles Univ., Prague
2
Mucin glycosaminoglycans & glycoproteins ground substance of mesenchymal tissue – hyaluronic acid, chondroitinsulphate… Source: fibroblasts Reg.: corticoids, thyroxin, vit. C….. epithelial – hexosamins, sialic acid, fucose… Source: epithelia cells ( goblet, foveolar…) Reg.: external irritation, inborn defects - mucoviscidosis
3
Mucin - morphology Macroscopy: gelatinous in larger deposits catarrh
Microscopy: mucikarmine alcian Blue PAS (positive following amylase pretreatment)
4
Myxoid Degeneration accumulation of the glycosaminoglycans
Definition: accumulation of the glycosaminoglycans in the ground substance of the tissue
5
Myxoid Degeneration hypothyroidism (exc. hyperthyr.)
Marfan´s syndroma (aorta, valves) ganglion floppy valve syndrome
6
Storage Diseases Def.: inborn errors of metabolism (mostly single gene abnormality) leading to an enzyme defect with subsequent accumulation of the substrate (& lack of the product) in tissues or organs
7
Epithelial Mucin - pathology
overproduction – acute inflammation „catarrh“ decreased production – chronic inflammation with mucose atrophy changed quality - mucoviscidosis preserved production - neoplasms
8
Mucoviscidosis cystic fibrosis, fibrocystic disease
autosomal recessive 7th chromosome 2-5% heterozygotic carriers in the caucasian population abnormal viscosity of mucin disturbance of the membrane associated protein that serves as a calcium channel increased concentration of chloride in sweat decreased water content in excocrine secrets
9
Mucoviscidosis cystic fibrosis, fibrocystic disease
Complications: meconium ileus steatorrhea pancreatic fibrosis & cysts bronchitis, bronchopneumonia, bronchiectasia sterility
10
Epithelial Mucin - pathology Complications -1.
overproduction : nonneoplastic cysts neoplastic cysts mucophagic granulomas decreased production: impaired trophic of the mucose dysplastic changes
11
Epithelial Mucin - pathology Complications -2.
changed quality: infection, cysts, scaring preserved production in neoplasms: aid for diagnosis
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.