UNIVERSITY OF MEDICINE AND PHARMACY CRAIOVA DOCTORAL SCHOOL. PhD THESIS ABSTRACT

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1 UNIVERSITY OF MEDICINE AND PHARMACY CRAIOVA DOCTORAL SCHOOL PhD THESIS ABSTRACT THE ROLE OF IMMUNOHISTOCHEMICAL EXAMINATION IN EARLY AND DIFFERENTIAL DIAGNOSIS OF CERVICAL CANCER PhD SUPERVISOR Prof. Univ. Dr. ŞTEFANIA CRĂIȚOIU PhD STUDENT ILEANA BARBU CRAIOVA

2 CONTENTS Introduction... 3 STATE OF KNOWLEDGE... 3 CHAPTER I. Histology and uterus histophysiology... 3 CHAPTER II. Epidemiology and pathogenesis of cervical cancer... 4 CHAPTER III. Distinctive signs of Cancer... 4 PERSONAL CONTRIBUTIONS... 4 CHAPTER IV. Disability caused by cervical neoplasm in Olt county... 4 CHAPTER V. Histopathological study of adenocarcinoma.. 5 CHAPTER VI. Immunohistochemical study of adenocarcinomas... 7 CONCLUSIONS... 9 Selected Bibliography Keywords: cervical adenocarcinoma, invalidity, histopathological variants, immunohistochemical markers. 2

3 INTRODUCTION Cervical carcinoma is the second most common cancer in women worldwide and it remains a leading cause of cancer-related death for women in developing countries. The diagnosis of cervical adenocarcinoma is clinically very important beacause of its poorer prognosis and lower sensitivity to radiotherapy and chemotherapy in comparison with squamous cell carcinoma [1, 2]. The purpose of this thesis is to supplement existing data in the specialized literature on clinicomorphological aspects of cervical cancer and to highlight immunohistochemical examination implications in early and differential diagnosis of cervical adenocarcinomas, in order to apply corresponding therapeutic management. In this respect, we performed a histopathological and immunohistochemical study on 16 cases of adenocarcinoma selected from the casuistry of the MorphoPathology Laboratory from the Slatina Clinical Hospital within We have also highlighted the adverse impact of cervical cancer at socioeconomic level, particularly on disability in the county of Olt. STATE OF KNOWLEDGE CHAPTER I HISTOLOGY AND UTERUS HISTOPHYSIOLOGY The uterus develops along with the other female internal genital organs (fallopian tubes and vagina) of Müller's channels (paramesonephrotic channels). The Müller channels have three portions: one portion of skull, dilated (ostium), an intermediate portion which opens through several orifices in the cloacal cavity and caudal portion, in which the two Müller channels approach but remain separated by the septum that will reabsorb in the 3 rd month of intrauterine life, when it will form the uterovaginal canal, through the union of the two channels. Thus, the skull portion and from the area from the beginning of the intermediate portion will form the fallopian tube, the intermediate bottom portion, the body and the cervix uteri, and lower portion of the uterovaginal canal will form the vagina. Anatomically, the uterus has three parts: the upper section and the most dilated is the body of the uterus, the isthmus, a narrow middle zone and the uterine cervix a lower portion of cylindrical shape. The cervix is divided by insertion of the vagina in two par areas: supra-vaginal and sub-vaginal (vaginal) that protrudes into the vagina. At the level of these segments, there are three cavities: the cavity of the body of the uterus, the isthmus canal and the cervical canal or uterine cervix canal [3]. Uterine wall has three tunics: tunica mucosa (endometrium), tunica musularis (myometrium), tunica serosa (perimeter). The cervix is the lower portion of the uterus and it has cylindrical shape. The wall has three tunics: mucosa, muscular-elastic (smooth muscle fibers and connective tissue rich in elastic fibers) and adventives. The cervix has two areas: exocervix and endocervix. The exocervix is the portion visible in the vaginal cavity, being covered by a nonkeratinized stratified squamous epithelium and an aglandular chorion and the endocervix or canal, which 3

4 continues the uterine isthmus, consisting of a simple cylindrical epithelium with numerous mucous cells and glandular chorion. CHAPTER II EPIDEMIOLOGY AND PATHOGENESIS OF CERVICAL CANCER Cervical carcinoma is the second most common cancer among women worldwide. Global burden is enormous, with over 500,000 new cases of cervical cancer diagnosed each year and 280,000 registered deaths [4]. While in developed countries screening programs have significantly reduced the incidence of the disease, about 80% of cervical cancers still occur in developing countries. Epidemiological studies conducted in the last 30 years have shown that the risk of cervical cancer is strongly influenced by the following factors: sexual activity, smoking, number of births, diet, infection with HPV, the use of birth control pills for a long time. HPV strains present most frequently in precancerous lesions of the cervix and cervical cancer are types 16 and 18. CHAPTER III HALLMARKS OF CANCER Vastul catalog de genotipuri de celule canceroase este determinat de șase modificări esențiale în fiziologia celulei, care determină creșterea malignă The broad catalog of cancer cell genotypes is determined by six essential alterations in cell physiology, determining the malignant growth [5]: o self-sufficiency in growth signals; o insensitivity to anti- growth signals; o evading apoptosis; o limitless replicative potential; o sustained angiogenesis; o tissue invasion and metastasis. CHAPTER IV DISABILITY CAUSED BY CERVICAL NEOPLASM IN OLT COUNTY Cervical cancer is the main cause of death among women aged between 15 and 44 years from Romania, when they are professionally active, this having a negative socioeconomic impact. I have conducted a clinicoepidemiological study and about the disability in Olt County between The following materials were used: population cancer registries, dispensary records of the patients with cervical cancer and statistics from the Department of Medical Expertise and Work Capacity Recovery Olt,between The results obtained reveal that the majority of female patients are uninsured, come from rural areas, have advanced disease stages and working capacity lost. 4

5 80 40% 60% Rural Urban T o t a l S t a g e III/IV Fig IV. 1 Distribution of cervical cancer cases by area of origin in Olt county in Fig IV.2- Distribution of new cases of cervical cancer by stage of disease during in Olt county total uninsured insured C a s e s Degree III Degree II Degree I Fig IV.3 Distribution by insurance status in Olt county Fig IV.4 The distribution of the disability degrees between in Olt county CHAPTER V HISTOPATHOLOGICAL STUDY OF ENDOCERVICAL ADENOCARCINOMA In the histopathological study we investigated the main clinicomorphological features of adenocarcinoma that might be involved in the prognosis of these patients. Histopathological material came from the casuistry of the MorphoPathology Laboratory of the Emergency Hospital from Slatina County and was represented by 16 archived paraffin blocks. In the morphological study we used the classic histological techniques including paraffin. As staining methods we used: Hematoxylin eosin (HE) for diagnostic evaluation according to the criteria for the classification of cervical tumors set by WHO (2003) [6]; Masson trichrome of aniline blue to assess the degree of fibrosis tumor; Alcian Blue Periodic Acid Schiff (PAS) to assess the profile of mucins (neutral versus acidic) secreted by tumor cells. In the table below are presented the main clinicopathological features of investigated casuistry (Table V.1). 5

6 Tabelul V.1 The major clinicopathological features of the investigated cervical adenocarcinoma Cervical adenocarcinoma type Age(yers) Tumor size(cm0 Differentiation Depth of stromal Invasion Depth of muscular invasion Parametrial involvement Lymph node metastasis Vaginal margins TNM 4 >4 W-M * P * 1/2L ** >1/2L 1/2L >1/2L IB IB IB IIB IIB IIIB IIIB intestinal IIB Mucinos villoglandular IB1 Mucinos villoglandular IB2 Endometroid IIB Endometroid IIIA Endometroid IIIB Endometrioid IIIB Serous IB2 Serous IIB - tumor degee of differentiation: W-M= well- moderate; P= poor; ** L= Layer Fig. V.1 Cervical adenocarcinoma - mucinous type.. HE stain, X100 Fig. V.2 Cervical adenocarcinoma - mucinous intestinal type. malignant cells with goblet cell morphology that apically present a pool of acidic mucins. AB PAS stain, X200. 6

7 Fig. V.3 Cervical adenocarcinoma. mucinous villoglandular type. HE stain, X40. Fig. V.4 Cervical adenocarcinoma endometrioid type. HE stain, X40. Fig. V.5 Cervical adenocarcinomm - serous type. HE stain, X40. In the investigated casuistry prevailed mucinous carcinoma cases (62.5%), with the subtype as most common (43.75% from all cases investigated and 70% from the all mucinous tumors). The second most common histopathological type of carcinoma was the endometroid type which accounted for 25% of all investigated cases. Other variants diagnosed include: serous adenocarcinoma (12.5%), mucinous villoglandular type (12.5%) and intestinal mucinous adenocarcinoma (6.25%). The most aggressive form of adenocarcinoma investigated proved to be the endometroid, the vast majority (75%) being diagnosed in advanced clinical stages IIIA and IIIB. A better prognosis had the serous, respectively the villoglandular varieties, which were diagnosed in less advanced clinical stages (IB and IIB). CHAPTER VI IMMUNOHISTOCHEMICAL STUDY OF ENDOCERVICAL CARCINOMAS The aim of immunohistochemical study was to assess the expression of immunohistochemical markers: CD105, VEGF, EGFR and c-erbb2 and their prognosis in different types of adenocarcinoma. In many situations, especially when a tumor involves both the lower uterine segment and upper endocervix, the distiction between a primary endometrial and a primary adenocarcinoma may be difficult. This differential diagnosis is 7

8 imperative because the treatment plans and adjuvant therapies are totally different forthe two forms of adenocarcinoma [7, 8]. This problem is partially solved by using appropriatepanels of antibodies. Several studies have reported that typical immunoprofile of the primitive adenocarcinomaseems to be ER-/PR-/Vim-/CEA+, wheares for primitive endometrial carcinoma the characteristic profile is ER+/PR+/Vim+/CEA-[9,10,11,12]. Our investigations proved that this panel specific to the adenocarcinoma was recorded in 62,5% of our cases [13]. In all investigated cases, we observed that the angiogenesis process identified by the determination of MVD CD105 was more intensive in peritumoral area, regardless of clinicomorphological features of thises cases (the degree of differentiation, depth of muscular invasion or TNM stage). For the first time, we revealed that the angiogenesis process seams to be dependent on histopathological subtype, with the highest values of MVD CD105+ recorded in the mucinous variant of adenocarcinoma and the lower values in serous type. Investigation of VEGF expression showed that regardless of histophatological variant, the highest values of VEGF reactivity corresponded to higher MVD CD105 values. Reactivity for markers CD105, VEGF, EGFR-1 and C-erbB2 allow the stratification of the patients with adenocarcinoma in order to determine the most effective treatment options that will target these molecular markers. Fig. VI.1 Cervical adenocarcinomamucinous villoglandular type.er negative reaction in the nuclei of neoplastic cells. DAB, X100. Fig. VI.2 Cervical adenocarcinomamucinous villoglandular type. PR negative reaction in the nuclei of neoplastic cells. DAB, X Fig. VI.3 Cervical adenocarcinomamucinous villoglandular type. VIM negative reaction in the cytoplasm of neoplastic cells but positive in blood vessels endothelial. DAB, X200

9 Fig. VI. Cervical adenocarcinomamucinous serous type. CEA positive reaction in the cytoplasm of neoplastic cells.dab, X100 Fig. VI.5 Cervical adenocarcinoma mucinous type. CD 105 positive reaction in blood vessels from peritumoral DAB, X200 Fig. VI.6 Cervical adenocarcinoma Intense cytoplasm EGFR reaction in the mucinous adenocarcinoma DAB, X200 CONCLUSIONS Cervical cancer remains a serious public health problem worldwide with high mortality in developing countries, especially in Romania. In our study, we highlighted that the clinical stage is the most important prognostic factor and that to same extent, same histopathological features of these tumors can condition their biological behavior. We also noticed that in adenocarcinomas there is an intense process of angiogenesis, which is controlled by the interrelation between VEGF, EGFR and c-erbb2. Further studies are needed to elucidate whether specific angiogenic molecular profiles exist in different histopathological subtype of uterine adenocarcinomas and which is their impact on prognosis and therapeutic outcomes for these patients. SELECTED BIBLIOGRAPHY [1]. Hopkins M.P., Morley G.W. Acomparison of adenocarcinoma and squamous cell carcinoma of the cervix. Obstet Gynecol 1991; 77:912 7; [2]. Tinga D.J., Bouma J., Aalders J.G. Patients with squamous-cell vs. adeno(squamous) carcinoma of the cervix; what factors determine the prognosis. Int J Gynecol Cancer 1992; 2:83 91; [3]. Papilian V., Roșca Gh. Tratat elementar de histologie vol.1. Ed. Dacia Cluj Napoca, 1977; [4]. Parkin D.M., Bray F., Ferlay J. Pisani P. Global cancer statistics, CA Cancer J Clin 55: , 2005; [5]. Hanahan D., Weinberg R. The Hallmarks of Cancer. Cell, Vol. 100, 57 70, January 7, 2000; [6] Wells M., Ostor A.G, Crum C.P., Franceschi S., Tommasino M., Nesland T.M., Tumors of the cervix. In: World Health Organization, editor. Tumors of the breast and female genital organs. Lyon: IARC Press, pp ; immunohistochemical panel. Arch Pathol Lab Med Dec;127(12): ; 9

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