Cytopathology 188524 209379832 2008-05-01T02:52:17Z ClueBot 4928500 Reverting possible vandalism by [[Special:Contributions/75.33.238.195|75.33.238.195]] to version by Chowbok. False positive? [[User:ClueBot/FalsePositives|Report it]]. Thanks, [[User:ClueBot]]. (350059) (Bot) '''Cytopathology''' is a branch of [[pathology]] that studies and diagnoses diseases on the cellular level. The most common use of cytopathology is the [[Pap smear]], used to detect cervical cancer at an early treatable stage. Cytopathology is frequently, less precisely, called '''cytology''', which is literally "study of [[cell (biology)|cell]]s."<ref>Cytology. Stedman's Medical Dictionary. URL: [http://www.emedicine.com/asp/dictionary.asp?keyword=cytology http://www.emedicine.com/asp/dictionary.asp?keyword=cytology]. Accessed on: January 22, 2008.</ref> ==Cell collection== Two methods of collecting cells for analysis are: #''[[Exfoliative Cytology]]'' &ndash; Cells are extracted from fluid shed into the body cavities. For example, in [[pleural cavity|pleural]] fluid, [[peritoneum|ascitic]] fluid, or in the case of the Pap smear, cells scraped from the cervix. #''Fine Needle Aspiration Cytology'' or ''[[Needle aspiration biopsy]]'' &ndash; An 18 to 27 gauge (most commonly 23-25) [[hypodermic needle|needle]] attached to a 10 cc syringe is used to aspirate (pull out) cells from lesions or masses in various organs of the body by application of negative pressure (suction). FNAC can be done directly on a mass in superficial regions like the neck, thyroid or breast; or it may be assisted by [[medical ultrasonography|ultrasound]] or [[CAT scan]]. FNAC, while poorly developed in the USA, is widely used in Europe and India. Being a skill dependent procedure, the success rate may vary. If performed by pathologist or as team with pathologist-cytotechnologist, the success rate of proper diagnosis is superior. The two countries with the most advanced FNAC services are Sweden (Karolinska hospital performs about 11 thousand annual aspirates), and Slovenia (Institute of Oncology performs about 10 thousand annual aspirates). The highest volumes in USA are encountered at Emory University Hospital in Atlanta GA, and MD Anderson Hostpital in Houston, TX, each contributing no more than 4 thousand aspirates per year. ==Equipment== Fine needles are 23 to 27 [[needle gauge|gauge]]. Needle diameters and color codes for 23G, 25G and 27G are as follows, respectively: 0,6 mm/Blue-dark, 0,5 mm/Orange, and 0,4 mm/Grey. If a cell-block preparation is indicated, after obtaining diagnostic cytology smears, a wider gauge needle, up to 18 gauge, may be used. ==Parameters== Various topics are studied by cellular pathologists: *[[organelle]] pathology *cell death **[[necrosis]] **[[apoptosis]] *[[cellular injury]] and response *cell [[ageing]] *[[amyloidosis]] *[[autoimmune]] diseases For instance, various normal functions of cell [[Cell growth|growth]], [[metabolism]], and [[Cell division|division]] can fail or work in abnormal ways and lead to various diseases such as [[cancer]]s. ==See also== *[[American Society of Cytopathology]] *[[Cell biology]] ==References== {{reflist}} ==External links== *[http://www.cytopathnet.org CYTOPATHNET Online Resource Center for Cytopathology] *[http://www.cytopathology.org American Society of Cytopathology] * bushy six-page [http://www.fleshandbones.com/readingroom/pdf/195.pdf mindmap PDF] expanding injury, death, aging, stress adaptation, and amyloidosis. *[http://www-medlib.med.utah.edu/WebPath/CINJHTML/CINJIDX.html Med/Utah] {{pathology}} [[Category:Pathology]] [[Category:Cell biology]] {{pathology-stub}} [[da:Cytologi]] [[no:Cytologi]] [[pt:Citopatologia]]