Abstract
Background: Fine-Needle Aspiration Cytology (FNAC) is a
widely accepted, safe, and cost-effective diagnostic tool for evaluating
salivary gland swellings. It helps differentiate between benign, inflammatory,
and malignant lesions, aiding in surgical planning and management.
Objective: This study aimed to compare FNAC results with
histopathology findings to assess the diagnostic accuracy of FNAC in evaluating
salivary gland swellings at St. Paul’s Hospital Millennium Medical College,
Addis Ababa, Ethiopia.
Methods: A four-year hospital-based cross-sectional
study was conducted on patients with salivary gland swellings who underwent
both FNAC and histopathology at St. Paul’s Hospital Millennium Medical College
from January 1, 2019, to August 30, 2022. Data were collected using a
standardized questionnaire and analyzed using SPSS version 27. Sensitivity,
specificity, Positive Predictive Value (PPV), Negative Predictive Value (NPV),
and accuracy were calculated using histopathology as the gold standard.
Results: Of the 475 FNACs performed, 110 cases had
correlating histopathology results. The parotid gland was the most commonly
affected site (46.4%), followed by the submandibular gland (42.7%) and minor
salivary glands (10.9%). FNAC demonstrated high sensitivity, specificity, and
accuracy: 100%, 98.83%, and 99.09% for non-neoplastic lesions; 96.4%, 92.6%,
and 94.5% for benign neoplasms; and 83.3%, 95.5%, and 94.54% for malignant
neoplasms, respectively.
Conclusion: FNAC is a highly sensitive and specific
diagnostic tool for evaluating salivary gland swellings. It is reliable for
preoperative planning and can help avoid unnecessary surgical interventions.
Keywords: Salivary gland, Fine needle aspiration
cytology, Histopathology, Diagnostic accuracy