Cytomorphological study of breast lesions with histopathological co-relation

Introduction: Breast Lesions (BLs) are commonly encountered in routine practice and have increased importance due to awareness of breast carcinoma, potential cosmetic disfigurement following surgery, hence BLs are one of indication for fine needle aspiration cytomorphology (FNAC). Objectives: 1) To study FNAC of various BLs. 2) To evaluate diagnostic accuracy of FNAC in comparison with Histopathology (HP) study. Materials and Methods: A retrospective study of 4 years included all 103 BLs cases (palpable and n on palpable) presented to Department of Pathology, District Hospital Vijayapur for FNAC, from Jan-2015 to Dec-2018. FNAC study was carried out, diagnosis were categorized. Out of 103 FNAC performed cases, 76 cases were referred to HP examination and diagnosed at Department of PathologyAl-Ameen Medical College Vijayapur. The HP slides were retrieved and analyzed. Data was collected from cytology and HP case records. Cytological diagnosis were compared with HP diagnosis and FNAC diagnostic accuracy was assessed. Observations: Total of 76 cases were included in the study, there were 74 females and 2 were males with age range of 18-65 years. Out of 76 cases 71 cases correlated with HP diagnosis, with diagnostic accuracy of 93.4% (71/76 cases), with highest number of benign BLs 92.1% (70/76 cases) and 100% correlation to malignant BLs (06/0 6 cases). Conclusion: Study reveals that there is good correlation of FNAC diagnosis with HP diagnosis. Hence FNAC is a useful, valuable, quick and reliable primary screening technique for breast lesions with high diagnostic accuracy. © 2019 Published by Innovative Publication. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by/4.0/)


Introduction
Breast lesions (BLs) are the most common illness in women contributing to a significant proportion of health care spending. Breast cancer is second most common malignant tumour & one of leading cause of death among females. More than 10 laks new cases occurring world wide every year. 1 and in India-75,000 new cases/year. 2 In USA 232,670 new cases and 40,000 deaths observed in 2014. Karyotype & molecular alterations in benign BLs parallel to those of breast carcinoma. 3 If Pre-malignant BLs recognized in early stage, possible to abort development of invasive cancer. 1,4 In recent years there have been outstanding advances in breast cancer management leading to earlier detection of disease and the development of more effective treatment resulting in significant decline in deaths due to breast cancer and improved outcome for women living with disease. 5,6 Hence it is very essential to screen of all BLs. FNAC observed best tool in screening the BLs. 1 FNAC widely accepted due to its high sensitivity, specificity & accuracy. 5,7 FNAC is simple, quick, reliable, inexpensive, OPD procedure and done on both palpable and non-palpable BLs and avoids unnecessary surgery in specific benign https://doi.org/10.18231/j.jdpo.2019.062 2581-3714/© 2019 Innovative Publication, All rights reserved. 299 conditions 5,6 gives rapid and accurate diagnosis. 6 It also plays a major role in pre-operative analysis of BLs 5

FNAC Study
Patients with BLs were subjected to FNA procedure after detailed history, general physical examination. Procedure of FNA explained to patient and verbal consent was obtained. The patients were suitably seated for aspiration. The lesion was located, under aseptic precautions the aspirations of the BLs were performed with 23 or 20gauge needle attached to a 5 ml or10ml syringes. The materials collected were smeared directly onto slides, 5-7 slides were prepared, two slides were fixed in alcohol and stained by Pap anicolaou's technique and two slides were stained with Leish man-Giemsa technique. Totally 103 FNA of BLs were done, studied and cytologicallycategorizedin to C1 to C5.

HP Study
Out of 103 FNAC performed cases, only 76 FNA cases were includedfor HP study, those 76 FNA lesions of excisedspecimens were fixed in Formalin, were referred to Department of Pathology Al-Ameen Medical College Vijayapur. All specimens were processed & stained with Haematoxylin-Eosin stain and conditions giving rise to the chronic granulomatous inflammatory lesions Z-N stain was used, all specimens were studied for tumour type and grading. All 76 cytological diagnosis were compared with HP diagnosis. Statistical Analysis were made for benign and malignant lesions in terms of True positive, True negative, Sensitivity, Specificity and Diagnostic accuracy.

Discussion
BLs are one of commonest illness presented by patients to the surgery. Early diagnosis of BL is important. FNAC has been widely used in detecting the presence or absence of cancer pre-operatively and as a guide to starting the specific treatment. 8 FNA today occupies an extremely important role in preoperative evaluation of BLs and in most centres patient management is decided on the basis of the cytological report. 9 Although prior cytological typing of breast carcinoma may have little influence on the surgical management of a case, awareness of certain types of carcinoma is necessary to correctly identify these lesions. Further more reconfirmation of prognostically favourable histological types is necessary to select patient for preoperative chemotherapy, 9 cytology plays an important role in benign lesions of breast, in the distinction of proliferative, inflammatory and granulomatous lesions. All the patient in the present study were subject to FNAC using syringes with a 23 and 20 number needles, with no discomfort or unto ward side effects, so because of good needling technique all samples yielded adequate material, hence inadequate sampling rate is 0% in our study, but it was 2% reported in similar study done by Hebbar AK et al. 10 Patel J 11 reported that FNAC results were influenced by the number needle maneuvers jabbing, more the number of to and fro of the needle more chances of getting an adequate material.
In our study age range of patients from 18-65 years, maximum numbers of patients were found in 21-30,followed by 18-20 and 31-40 years respectively. But in Rathi Met al 12 reported in the study maximum incidence of BLs were in 30-39 years. Benign lesions were observed in all age groups but were most common in 18-30 years patients. Commonest age group for malignant lesions in 51-60 and 61 -65 years in our study as Table 3.
There was notable female predominance (F -74, M-02) of the lesions in our study as similar in Vasudev et al study. 13 In the present study right breast (39)was most commonly affected than left breast (35) and bilateral(02) involvement seen as similar to study done by A. C Shrivatsav 14 Majority symptoms was painless mobile lump(52), [3.8]. Majority of the BLs situated in right breast upper outer quadrant in both benign (24)cases as well as malignant (04) cases 15 In present study Benign BLs (70) were highest and malignant (06) were lowest as in Table 14 and similar to other studies. 16,17 This highest number of benign than malignant lesions cases may be due to good follow up or more awareness among the patients. Most common lesion noted in our study was Fibroadenoma(28) as a benign tumour, this was followed by fibrocystic diseases and all male (02) patients diagnosed as Gynaecomastia, which commonest benign lesion among male BLs. as similar findings noticed by Deshapande K. 18 In our study all FNAC benign (65) & ma lignant (6) casesconfirmed with HP 3 Present study showed that among the malignant lesion, IDC was the commonest lesion as similar finding was observed in other studies [ 10,18]. In present study cytologically observed atypical probably benign (04) cases were diagnosed as benign lesions as Fibroadenoma (2), Fibrocystic change (1) and proliferative lobular hyperplasia(1). In these atypical probably benign (04) lesions, few cells were showing nuclear atypia with scanty bipolar cellswhich was due to proliferation process, in some cases exact cause of atypia cannot be determined.
In our study, cytologically suspicious of malignant Phyllodes (1) case was diagnosed as benign Phyllodes tumour in HP study, the cause might be hitting the area which was showing hyperplasia of stromal cells with nuclear atypia.
In our study, 76 FNAC diagnosis were compared with HP diagnosis. With respect to malignant lesions, FNAC malignant lesions diagnosis compared with HP diagnosis, as all FNAC malignant 06 cases were confirmed as malignant only, so True positive were 100%, we found Sensitivity as 100%. As there was no lesion which was found negative on FNAC and turned to positive as malignant in HP study, so True negative cases 100 %, hence Specificity of FNAC was 100%. Diagnostic accuracy was 93.4%, as there was cordancy with HP for 71 cases (71; 65 benign + 06 malignant cases) as Tables 9 and 10.
In present study more number of benign and less number of malignant lesions found cytohistopatho logically as similar studies done by various authors in Table 17 [19][20][21][22] . In our study for malignant lesions, Sensitivity was 100%, and Specificity was 100% and Diagnostic accuracy was 93.4%, which were highest when compared to statistics of other similar studies done by various authors, [22][23][24][25][26] our study statistics were relatively yielded good results as shown in. Table 18 5. Conclusion 1. FNAC is very good simple tool to differentiate BLs. 2. FNAC is a easy, safe, repeatable simple OPD procedure.  3. It yields a definite diagnosis when compared to histopathology reports. 4. It is very good tool w hen compared with Histopathological study. It yielded a high diagnostic accuracy (93.4% ) with high sensitivity and specificity. 5. Hence it can be considered as very good diagnostic tool in diagnosis of breast lesions.

Source of Funding
None.

Conflict of Interest
None.