Oncology Journal of India

ORIGINAL ARTICLE
Year
: 2018  |  Volume : 2  |  Issue : 2  |  Page : 25--28

Cytological pattern of papanicolaou smears and detection of cervical cancers: An experience from a tertiary care center of eastern zone of India


Debasmita Das, Asaranti Kar, Shreya Rath, Subrat Kumar Baliarsingh, Dibyajyoti Prusty, Akhyaya Kumar Dash 
 Department of Pathology, S.C.B. Medical College, Cuttack, Odisha, India

Correspondence Address:
Dr. Asaranti Kar
Department of Pathology, S.C.B. Medical College, Cuttack - 753 007, Odisha
India

Abstract

Aim of the Study: The present study attempts to explore various types of lesion of the uterine cervix and to find target age groups in which screening efforts can be concentrated for early detection of cervical cancers. Materials and Methods: The study was carried out at a tertiary care institute during the period from May 2016 to December 2017. All the previously conducted cervical Papanicolaou (Pap) smears were analyzed and reported as per the 2001 Bethesda system. The data were noted in a structured pro forma and evaluated. Results: A total of 5025 Pap smears were examined. Maximum number of patients was in the age group of 31–40 years (33.25%). Out of 5025 pap smears, 6.60% (332) of cases were found to be unsatisfactory or inadequate samples, 90.97% (4571) cases were reported as negative for intraepithelial lesion or malignancy, and 2.43% (122) cases had epithelial cell abnormality (ECA). Premalignant lesions such as: atypical squamous cells of undetermined significance (ASCUS), low-grade squamous intraepithelial lesion (LSIL), high-grade intraepithelial lesion (HSIL) and atypical squamous cells-cannot exclude HSIL (ASCH), and malignant lesions such as squamous cell carcinoma and adenocarcinoma were reported under the ECA positive cases. Majority of premaligant lesions found in the age group of 41–50 years and constitute 44.64% (25/56). Whereas, majority of frank malignancy cases found in the age group of 51–60 and >60 years constituting 43.94% and 37.88%, respectively. Among all the ECA positive cases, 54.10% of cases found to be with malignancies. Conclusion: Proper implementation of Pap smear screening examination can decrease the incidence of cancer cervix along with its downstaging by early detection of precancerous lesions.



How to cite this article:
Das D, Kar A, Rath S, Baliarsingh SK, Prusty D, Dash AK. Cytological pattern of papanicolaou smears and detection of cervical cancers: An experience from a tertiary care center of eastern zone of India.Oncol J India 2018;2:25-28


How to cite this URL:
Das D, Kar A, Rath S, Baliarsingh SK, Prusty D, Dash AK. Cytological pattern of papanicolaou smears and detection of cervical cancers: An experience from a tertiary care center of eastern zone of India. Oncol J India [serial online] 2018 [cited 2019 Aug 20 ];2:25-28
Available from: http://www.ojionline.org/text.asp?2018/2/2/25/234903


Full Text



 Introduction



Cervical cancer is the most common cancer-related cause of death among women in developing countries.[1] Current data from the National Cancer Registry Program indicate that the most common cancer in women in India is the breast and the cervix.[2] Cancer cervix is the third most common cancer, after breast and colorectal cancer and the fourth leading cause of cancer death in women worldwide.[3] Incidence and mortality of cancer cervix in the world are 530,232 and 275,008/year, whereas in India, it is 134,420 and 72,825/year, respectively.[4] It is good to know that cervical cancer is on the declining trend in India according to the population-based registries. However still, it is one of the major causes of morbidity and mortality for women in India. Over the past few decades, there have been significant changes in its incidence. This has been possible due to its early detection by screening for cervical cancer is one of the few cancers that can be easily detected at premalignancy phase. Exfoliative cervicovaginal cytology, Papanicolaou (Pap) smear has been regarded as the gold standard for cervical cancer screening programs.[5] Studies on the accuracy of conventional cervical cytology have shown sensitivity to be 72% and specificity to be 94%.[6] An effective mass screening program at a specific age group is necessary for early detection of the precancerous lesions to prevent progression into invasive cancer.[7],[8]

The present retrospective study was carried out with an objective to evaluate cervical smears and its role in the screening of cervical cancer and precancerous lesions in a tertiary care hospital.

 Materials and Methods



The present retrospective study was conducted on 5025 patients undergoing Pap smears examination by conventional method in the Department of Pathology at a teaching tertiary care hospital of the Eastern zone of India during the period from May 2016 to December 2017.

Relevant clinical data were obtained from the patients and recorded. The specimen for Pap smears were collected from the squamocolumnar junction by the Ayer's spatula and cytobrush under aseptic methods, and the obtained cellular materials were quickly smeared on a clean glass slide. Slides were fixed with absolute alcohol and were stained with Pap stain. Slides were examined under the light microscope and reporting was done by cytopathologists as per the 2001 Bethesda system. The data were compiled in a structured pro forma and analyzed.

Previously diagnosed cases with any kind of cervical lesions benign, premalignant, or malignant lesions were excluded from the study.

 Results



A total of 5025 Pap smears were examined. Maximum number of patients (3161/5025 = 62.90%) were in the age group of 31–50 years [Table 1]. Majority of the patients were presenting with the chief complain of vaginal discharge (63.00%:3166) followed by lower abdominal pain (25.20%:1266) and postmenopausal bleeding (8.26%:415), and 3.54%:178 of the patients were attending the clinic for a normal routine check-up. The findings of pap smears were broadly classified into two groups such as unsatisfactory smears and satisfactory/adequate smears. There were 332 (6.60%) unsatisfactory smears and 4693 (93.40%) adequate smears. The unsatisfactory or inadequate smears were due to either paucity of squamous cells, excess blood, or heavy inflammation obscuring squamous cells.{Table 1}

Negative for intraepithelial lesion or malignancy (NILM) was reported in 97.40% of all the adequate smears and 90.97% of the total smears taken for the study. Out of all the NILM cases, majority cases (94.97%, i.e., 4341/4571) were reparative benign cellular reactive changes, followed by normal smears (5.03% i.e., 230/4571) [Table 2]. Out of all the benign reactive changes, majority were nonspecific inflammation followed by atrophic vaginitis and metaplasia constituting 95.97%, 3.18%, and 0.85%, respectively [Table 2]. The rate of nonspecific inflammatory positive cases was 82.90% in comparison to total smears taken.{Table 2}

A total of 122 smears were reported to have epithelial cell abnormality (ECA) positive consisting of 2.60% of all the satisfactory smears and 2.43% of the total smears taken in the study. The majority of ECA positve cases were squamous cell carcinoma (SCC) constituting 52.46%, followed by low-grade squamous intraepithelial lesion (LSIL) (21.31%), high-grade squamous intraepithelial lesion (HSIL) (14.75%), atypical squamous cells (ASC) (9.84%), and adenocarcinoma (1.64%). Out of 12 cases of ASC, five cases were ASC of undetermined significance (ASCUS) and 7 cases were ASC-cannot exclude HSIL (ASCH). Majority of ASC, LSIL, and HSIL patients belonged to 41–60 years age group constituting 75% (42/56). Whereas, majority of SCC were found after the age of 50 years constituting 82.25% of cases and both the cases of adenocarcinoma were reported after the age of 50 years [Table 3].{Table 3}

 Discussion



With the changes in the lifestyles and demographic profiles in developing countries, noncommunicable diseases, like cancer has been a major cause of morbidity and mortality. In the developing countries including India, cervical cancer is a major part of morbidity and mortality among all the female malignancies. However, it is a readily preventable and diagnosis can be possible at the preinvasive stage with proper cytological screening.

There are various screening tests for cervical cancer such as Pap smear, liquid Pap cytology, automated cervical screening techniques, visual inspection of the cervix after Lugol's Iodine and acetic acid application, speculoscopy, cervicography, and HPV DNA testing. Out of all these, exfoliative cytology has been regarded as the gold standard for cervical screening programs.[9] Pap smear is the simple painless, reproducible, cost-effective, reasonably accurate test, and sensitive tool for screening of various types of lesion in cervix both nonneoplastic and neoplastic.[10]

Maximum number of the patients (33.25%) attending for pap smear were in the age group of 31–40 years and was supported by Bamanikar et al., where 32.68% of the patients were in the same age range.[11] Majority of the patients (63%) attending for pap smear were having vaginal discharge as the chief complaint and was supported by other studies.[11],[12]

In this study, NILM rate was 90.97% and nonspecific inflammatory findings is the predominant form with the rate of 82.90%. Whereas, Bamanikar et al., Ranabhat et al., and Atilgan et al. reported 88.93%, 95%, and 74.3% of cases of NILM, respectively, and inflammatory smear is the predominant form in Bamanikar et al. supporting out data.[11],[12],[13]

According to various studies, the ECA rate varies between 1.5% and 12.60%.[14],[15] The ECA rate in our study was 2.43%, whereas it was 1.89%, 5.36%, 8.18%, and 2% in Tailor et al., Bamanikar et al., Banik et al., and Malpani et al., respectively.[10],[11],[16],[17] In our study, SCC is the predominant form of ECA followed by LSIL, HSIL, and others. Whereas LSIL was reported as the predominant form in Banik et al. and Malpani et al.[16],[17] The malignancy rate in our study was more than 1%, i.e., 1.31%, whereas most of the studies found the malignancy rate of <1%, i.e., 0.71%, 0.35%, and 0.2% in Bamanikar et al., Banik et al., and Edelman et al., respectively.[11],[16],[18] The probable reason for the higher rate of malignancies in our study was due to the late presentation for the symptoms. Furthermore, the age range for ECA in Bamanikar et al. was 20–75 years with the mean age of 44.1 years, whereas, the mean age for ECA in our study was 53.61 years.[11]

According to previous studies, the most common age to develop carcinoma of the cervix is the fifth decade, and the precursor lesions occur 5–10 years before the development of invasive carcinoma.[19] However, in this study, HSIL and SCC were seen predominantly (56/75 cases = 74.7%) after 50 years of age group.

 Conclusion



In the present study, most of the premalignant and malignant lesions occur in patients above the age of 40 years, and Pap smear examination should be started in women at the age of 30–40 years. Hospital-based data are required to detect the efficacy of the Pap smear screening test. The community needs to be enlightened about Pap test through diffuse educational activities. We can develop a cost-effective screening method by training medical and paramedical staff at primary health center level.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

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