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CC BY-NC-ND 4.0 · Indian J Med Paediatr Oncol 2018; 39(03): 276-281
DOI: 10.4103/ijmpo.ijmpo_141_16
Original Article

Clinicopathological Correlation of Adenoid Cystic Carcinoma: A Notorious Masquerader and Clinical Paradox

Preeti Sharma
Department of Pathology, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India
,
Vidya Jha
Department of Pathology, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India
,
Ashish Kumar Mandal
Department of Pathology, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India
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Abstract

Background: Adenoid cystic carcinoma (ACC) is an uncommon tumor with nonspecific clinicoradiological features thereby masquerading other nonneoplastic and neoplastic entities. Materials and Methods: Cases of ACC were retrospectively reviewed over a period of 4 years. The clinical details of these patients including fine-needle aspiration cytology (FNAC) and imaging findings were retrieved. Diagnosis was confirmed on histomorphology and supplemented with immunohistochemistry (IHC). Results:: Thirty cases of ACC were included in the study. Mean patient age was 55.5 years with a slight female preponderance. Among the 30 ACCs, 10 (33.4%) were located in submandibular gland, 7 (23.4%) in parotid gland, 6 (20%) in sublingual gland, 2 (6.7%) in lung and one each (3.33%) in nasal cavity, breast, cervix, lip, and skin of face. Preoperative imaging was suggestive of malignancy in 29 cases while a single case of parotid gland ACC was misdiagnosed as benign salivary gland neoplasm. FNAC was performed in 29 cases with a diagnostic accuracy of 82.7%. Histopathological examination showed characteristic features of ACC in all cases with perineural invasion seen in 7 cases. On IHC, positivity for cytokeratin was seen in all cases, cluster of differentiation 117 in 24 cases, thyroid transcription factor-1 in two cases and human epidermal growth factor receptor/neu in two cases. All cases were negative for estrogen receptor and progesterone receptor IHC. Mean Ki-67 score was 47.8%. Conclusion: ACCs are notorious tumors showing slow growth kinetics with propensity for perineural invasion, late recurrences, and distant metastasis. It should be kept in mind as a differential diagnosis at unusual sites other than salivary glands.

Keywords

Adenoid cystic carcinoma - fine-needle aspiration cytology - perineural - salivary glands


Publication History

Article published online:
17 June 2021

© 2018. Indian Society of Medical and Paediatric Oncology. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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