Emakakaela patoloogia 1.
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1 Günekoloogiline patoloogia Emakakaela patoloogia 1. Ave Minajeva
2 Kirjandus Diane Solomon (Ed), Ritu Nayar. The Bethesda System for Reporting Cervical Cytology: Definitions, Criteria, and Explanatory Notes. Secon edition. Bethesda system web atlas
3 Kirjandust eesti keeles: Minajeva, A. (2007). Inimese papilloomiviirusest tingitud p16 (üle)ekspressiooni immunohistokeemiline hindamine emakakaelavähi ja düsplaasiate diferentsiaaldiagnostikas. Eesti Arst, 86,
4 Cervical cancer incidence and mortality are related to cytological screening
5 Güneko-tsütoloogilise uuringu tehnika kanal portio üleminekutsoon Ayre spaatel endotserviksi hari
6 Hari (endotserviks) Ayre spaatel (cul- de- sac) Ayre spaatel (täiustatud)
7 Cul de sac (kotipõhi) günekoloogilises anatoomias
8 kahemomentne materjali klaasile kandmine emakakaela portio kanalist, emakaõõnest
9 Täiustatud Ayre spaatel võimaldab ka ühemomentset materjali pealekandmist
10 Papanicolaou värving (Pap värving) Multikromaatiline värvimismeetod histoloogilisele ja tsütoloogilisele materjalile. George Papanicolaou: Kaasaegse kliinilise tsütoloogia rajaja. Georgios Nicholas Papanikolaou (George Papanicolaou)
11 Rakuliigid PAP testis vastavalt anatoomilisele paiknemisele TRANSFORMATSIONI- TSOONIST: METAPLASTILINE LAMEEPITEEL KAELA- KANALIST: SILINDER (NÄÄRME-) EPITEEL PORTIO: LAMEEPITEEL
12 Endotservikaalne silinderepiteel (cervical columnar epithelium) histoloogiliselt
13 Histoloogiliselt esineb tupes ja emakakaela tuppe ulatuval osal (nn. portiol) mitmekihiline lameepiteel, millele tsütoloogiliselt vastab 3 liiki rakke: pinnakiht pindmise vahekihi vahekiht sügava kihi rakud. parabasaalkihid basaalkiht süvakiht basaalkiht
14 Milliseid prekantseroosseid muutusi uuritakse ja kuidas neid klassifitseeritakse?
15 Emakakaela vähieelsed seisundid Histoloogilised terminid CIN Cervical Intraepithelial Neoplasia CIN 1 = nõrk düsplaasia CIN 2 = mõõdukas düsplaasia CIN 3 = raske düsplaasia ja Carcinoma in situ Tsütoloogilised terminid SIL Squamous Intraepithelial Lesion LSIL - low-grade SIL (vastab CIN1) HSIL (high-grade SIL) = (vastab CIN2 ja CIN3)
16 Cervical Precancerous States Histology CIN Cervical Intraepithelial Neoplasia CIN 1 = mild dysplasia CIN 2 = modarate dysplasia CIN 3 = severe dysplasia and Carcinoma in situ Cytology SIL Squamous Intraepithelial Lesion LSIL - low-grade SIL (correlated to CIN1) HSIL (high-grade SIL) = (correlated to CIN2 and CIN3)
17 Kaks süsteemi PAP süsteem Bethesda süsteem loodud a. Dr. George Papanicolau poolt.koostatud erialaspetsialistide poolt
18 The Bethesda System for Cytological Diagnosis Papanicolau stain of cervical smear Specimen adequacy * Description NILM - Negative for Intraepithelial Lesion and Malignancy (PAP I-II) Normal Infections Reactive and reparative cell changes Pathological changes (squamous and columnar epithelium)
19 Pathological Changes of squamous epithelium in Cytology Changes suggestive of SIL ASC-US - Atypical Squamous Cells of Undetermined Significance ASC-H Atypical Squamous Cells, cannot exclude HSIL SIL Squamous Intraepithelial Lesion LSIL - low-grade SIL HPV related cell changes, mild dysplasia (histologically CIN1) HSIL - high-grade SIL (histologically CIN2 and CIN3) Moderate dysplasia (histologically CIN2) Severe dysplasia (histologically CIN3) Carcinoma in situ Squamous cell carcinoma
20 PAP klassifikatsioon Bethesda süsteem PAP I PAP II Norm normipärased rakud. reaktiivsete muutustega rakud ASC-US ASC-H üksikud atüüpilised rakud PAP IIIa LGSIL nõrk düsplaasia PAP III PAP IIIb HGSIL mõõdukas düsplaasia tugev düsplaasia PAP IV üksikud vähirakud PAP V emakakaela vähk emakakaela vähk
21 Emakakaela düspaasia etiopatogenees selle seos erinevate düsplaasia astmetega.
22 Inimese papilloomiviirus, HPV Emakakaelavähi ja vähieelsete seisundite etioloogiliseks teguriks on HPV viirus (papovaviridae). 1 kaheahelaline DNA molekul (kõik geenid kodeeritakse ühel DNA ahelal)
23 H P V t ü ü b i d t o i m e HPV madal risk 6, 11, 42 HPV kõrge risk 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 66, 68 naha ja limaskesta näsalised vohandid kondüloomid (papilloomid), kerge atüpism limaskestade vähieelsed seisundid vähk Erinevad tüved, mis infitseerivad alumist genitaaltrakti, jagunevad: Madala riskiga HPV tüved - on seotud kondüloomidega ja nõrga düsplaasiaga. Kõrge riskiga HPV tüved - põhjustavad emakakaela rasket düsplaasiat ja invasiivset vähki;
24
25
26
27 Patogenees
28 Viirused nakatavad lameepiteeli basaalseid rakke (jagunemisvõimelised rakud). Viirus tungib basaalrakkudeni läbi epiteeli mikroabrasioonide.
29 LATENTNE FAAS: Viiruskoopiate arv püsib konstantne mitme rakupõlvkonna vältel. Latentses faasis infektsioon võib kliinilselt mitte avalduda.
30 HPV võib säilitada oma genoomi püsiva ekstrakromosomaalse elemendina rakutuumas episomaalses vormis (madala riskiga HPV tüved):
31 PRODUKTIIVNE FAAS: Nakatunud rakud liiguvad epiteeli küpsemise käigus pindmistesse kihtidesse. Küpsetes rakkudes algab viiruse vegetatiivne replikatsioon pakitud viiruspartiklid jõuavad koos surnud rakkudega limaskesta pinnale.
32 Viiruspartiklid elektronmikroskoopiliselt Rakutuumast vabanevad viiruspartiklid lõhustavad tsütoskeletti halo tuuma ümber: koilotsüüt (Kr. tühi).
33 Kliiniliselt kondüloomid kolposkoopia
34 Progresseerumine raskeks düsplaasiaks ja vähiks: persisteeruv suure riskiga HPV infektsioon. Viiruse DNA integreerub peremeesraku genoomi.
35 Viiruse onkoproteiinide ekspressioon E6 E7 p53 inhibeerib prb Tuumorsupressorgeenid
36 Viiruse onkoproteiinide toime E6 E7 inhibeerib prb Tuumorsupressorgeen inhibeerib P16(INK4a) üleekspressioon Tsükliinsõltuva kinaasi inhibiitor
37 P16 üleekpressiooni saab raskes düsplaasias ja vähis immunohistokeemiliselt hinnata P16 positiivne värving kattub düsplaasia ulatusega. Mõõdukas düsplaasia (CIN II)
38 H&E p16 Raske düsplaasia (CINIII): düsplastilised rakud kogu epiteeli paksuses.
39 H&E p16 Invasiivne vähk
40 CIN- cervical intraepithelial neoplasia = histoloogiline termin! CIN diagnoos põhineb tuumade atüpismi astmel ja lameepiteeli küpsemise häirumisel ( kaob epiteeli polaarsus) Low-grade madala astme kahjustus: CIN1: sage iseeneslik regressioon, vajalik jälgimine progressiooni suhtes High grade kõrge astme kahjustus (CIN2 ja CIN3): konisatsioon. SIL ja CIN vastavus:
41
42 CIN related to SIL
43 Lameepiteeli düsplaasia astmed: intraepiteliaalne neoplaasia (CIN) histoloogiliselt
44 CIN 1 puhul sageli epiteeli pindmises kihis HPV infekts tunnused, koilotsütoos, düskeratoos, tuumade hüperkromaasia, hulgituumsed rakud, ebaühtlane tuuma kontuur. Erinevalt HSIL-st säilub epiteeli kihinine küpsemine ning mitoose näeb ainult basaalses/parabasaalses kihis. Düsplastilisi ebaküpseid rakke ainult epiteeli basaalses 1/3. NORM CIN 1
45 CIN 2 korral võib pinnakihis olla HPV kahjustust ja epiteeli pindmises osas säilub küpsemine. CIN 3 korral mitte. CIN 2-CIN 3. Tuumade tugev atüpism epiteeli süvakihtides. Tuuma/tsütoplasma suhe, hüperkromaasia, tuumade kontuur ebaühtlane. Mitoosid, neid võib leida epiteeli pindmises ½. Võib esineda atüüpilisi mitoose. Rakulise polaarsuse kadumine. CIN 2 Ki 67: mitooside arvu CIN 3
46 Progression of HPV-induced lesion
47 HSIL puhul (CIN II-CIN III) emakakaela konisatsioon.
48 Konisatsioonimaterjal reeglina uuritakse patoloogiliselt täies ulatuses. Võimalusel märgitakse, kas konisaadi lõikepiir düsplaasiavaba
49 Mikropreparaat Gy44. Dysplasia epithelii gravis (CIN III) Emakakaela konisaadis. Emakakaelakanal, mida kattev metaplastiline lameepiteel on raske düsplaasia tunnustega. Endostervikaalsed näärmed
50 Mikropreparaat Gy44. Dysplasia epithelii gravis (CIN III) Emakakaela konisaadis. Emakakaelakanal, mida kattev metaplastiline lameepiteel on raske düsplaasia tunnustega. Endostervikaalsed näärmed
51 Mikropreparaat Gy44. Dysplasia epithelii gravis (CIN III) Emakakaela konisaadis. Endostervikaalsed näärmed Raske düsplaasia: kogu lameepiteeli paksuses atüüpilised rakud, mitoosid
52 Mikropreparaat Gy44. Dysplasia epithelii gravis (CIN III) Emakakaela konisaadis. Düsplastilised rakud tungimas metaplastilistesse endotservikaalsetesse näärmetesse
53 Mikropreparaat Gy44. Dysplasia epithelii gravis (CIN III) Emakakaela konisaadis. Raske düsplaasia: kogu lameepiteeli paksuses atüüpilised rakud, mitoosid
54 CIN 3 hõlmab rasket düsplaasiat ja carcinoma in situ, mõlemad mitteinvasiivset vähieelsed seisundid. Kui olla täpne, siis carcinoma in situ puhul: 1. Puudub rakkude küpsemine kogu epiteeli paksuses. 2. Pindmise kihi rakud võivad olla lamenenud.
55 Invasiivne kartsinoom
56 Sarvestuv lamerakk-kartsinoom Mittesarvestuv lamerakk-kartsinoom
57 Mikropreparaat Gy 43. Emakakaela sarvestuv lamerakuline kartsinoom Normaalne mitmekihiline lameepiteel Sarvestuv lamerakuline kartsinoom: Invasiivne kasv emakakaela stroomasse
58 Mikropreparaat Gy 43. Emakakaela sarvestuv lamerakuline kartsinoom (G2) Kartsinoomikolded invasiivne kasv: Kollete servas strooma desmoplastiline reaktsioon Atüüpiliste lameepiteelirakkude kollete keskosas sarvestunud rakke
59 Edaspidi tutvume lähemalt PAP testiga ja näärmeepiteeli muutustega.
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