Parotid Gland Tumours: Our Experience

Abstract

Salivary gland tumor comprises of approximately 3 to 10% of neoplasms of the head and neck region. Parotid gland is the most commonly involved salivary gland with an incidence of 62% followed by submandibular gland and other minor salivary gland tumors. However clinical course of benign and malignant tumors resemble each other in clinical findings, we require histopatholocal or cytological diagnosis for planning of management. To analyze parotid tumors retrospectively with following objectives. (1) Demographic distribution of parotid tumors. (2) To evaluate cytological and histopathological findings of parotid tumors. (3) Correlation of cytological and histopathological findings of parotid tumors. It was a retrospective observational study involving 31 patients who presented with parotid region swelling. Pre operative FNAC (fine needle aspiration cytology) and post operative histopathology were correlated. Surgical management depended on nature of disease. Correlation of FNAC and Histopathology: among 27 cases pre operative FNAC and post operative histopathology was same and in only 3 cases reports differed. One FNAC was inconclusive. In present study, Sensitivity of FNAC is 81.81%, Specificity is 94.73% and accuracy is 90%. FNAC is usually the first investigative modality, as it is a minimally invasive, cheap, OPD procedure that can differentiate benign from malignant tumors. Knowing preoperative pathological nature of disease can help in planning of surgical process.

Role of Fine Needle Aspiration Cytology in the Diagnosis of Parotid Gland Tumors: Analysis of 193 Cases

“…In the literature, the diagnostic accuracy of FNAC for parotid tumors has been reported as ranging from 84% to 97%. 2 10 16 22 Comparatively, in our study, it was reported as 95.8%, which is within the given range. Specimens reported to be nondiagnostic are a major drawback of FNAC, which has been reported to occur in between ∼ 5 and 15% of the cases in the literature.…”

“…The sensitivity of FNAC in detecting malignancy was 89%, which falls in a wide range of sensitivity reported in the literature, from as low as 27% to up to 97%. 2 10 13 16 20 21 The reason of this widely reported range of sensitivity is the dependence on the skills of the cytotechnologist performing FNAC and the expertise and experience of the pathologist to assess the adequacy and accurate examination of the provided specimen.…”

“…In our study, the specificity was reported to be 98%, which is similar to what has been reported in the literature, ranging from 84% to 100%. 2 10 13 16 The false negative FNAC results included a variety of lesions. Sampling error constitutes a common reason for false negative FNAC finding.…”

“…Salivary gland tumors are a rare entity and account for between $ 3 and 10% of head and neck tumors and up to 0.6% of all tumors of the human body. 1,2 A total of 80% of the salivary gland tumors involve the parotid gland, and 80% of these tumors are benign. 3 The World Health Organization (WHO) has classified parotid tumors as epithelial and nonepithelial tumors.…”

Giá Trị Chọc Hút Bằng Kim Nhỏ U Tuyến Mang Tai Tại Bệnh Viện Đại Học Y Dược TP.HCM Từ 2020 Đến 2021

“…Phù hợp với nghiên cứu của Đinh Xuân Thành (4) năm 2010 tuy nhiên giá trị chẩn đoán dương trong nghiên cứu của chúng tôi thấp hơn, tác giả Đinh Xuân Thành với mục đích chẩn đoán phân biệt tổn thương lành tính với ác tính với độ nhạy của FNA là 100%, độ đặc hiệu là 93%, giá trị tiên đoán dương là 100% và giá trị tiên đoán âm là 100%. So sánh với nghiên cứu của Chauhan N (5) năm 2019: FNA có độ nhạy là 81,81%; độ đặc hiệu là 94,73%, giá trị tiên đoán dương tính là 90% và giá trị dự đoán âm tính là 90%, độ chính xác là 90%. So sánh với ghiên cứu Dhanani R (6) của năm 2020: độ nhạy, độ đặc hiệu, giá trị chẩn đoán dương tính và âm tính, độ chính xác của FNA lần lượt là 88,9%; 97,9%; 93%; 96,7%; 95,8%.…”