Canalicular adenoma is a rare benign salivary gland tumor that occurs almost exclusively in the upper lip. Rarely, this benign tumor may occur multifocally in the oral cavity. We report a case of canalicular adenoma in bilateral parotid glands, discuss histological characteristics, and review this tumor.
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Canalicular Adenoma of Parotid- A Rare Case Report.
Indian J Otolaryngol Head Neck Surg
October 2024
Department Of Otorhinolaryngology, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu 603103 India.
Salivary gland canalicular adenoma is rare yet benign. It accounts for fewer than 1% of salivary tumors and is the third most common non-cancerous mass in the small salivary glands. A 45-year-old presented to the outpatient department with complaints of swelling in the left parotid region for the past 3 years.
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Histopathology
October 2024
Robert J. Tomsich Department of Pathology and Laboratory Medicine, Cleveland Clinic, Cleveland, OH, USA.
Aims: Pleomorphic adenoma (PA) with a prominent trabecular/canalicular morphology has consistent HMGA2 protein expression, and association with HMGA2 fusions. We report our experience with this subtype, with emphasis on the carcinomas that can arise in this context.
Methods And Results: A retro- and prospective review (2013-2024) of major salivary gland tumours with prominent trabecular/canalicular morphology was performed.
Striated Duct Adenoma: A Case Report and a Scoping Review.
Head Neck Pathol
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Faculty of Medical Sciences of Minas Gerais, Alameda Ezequiel Dias, 275, Belo Horizonte, MG, Brazil.
Introduction: Striated duct adenoma (SDA) is a rare benign salivary gland tumor with a recently described genetic signature. Recurrent oncogenic mutations affecting the IDH2 gene differentiate SDA from its primary differential diagnosis of canalicular adenoma. Here, we report a case of SDA affecting the parotid gland with IDH1/2 mutation-specific immunohistochemical positivity.
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Oral Surg Oral Med Oral Pathol Oral Radiol
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Oral Diagnosis Department, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
Article Synopsis
- - A retrospective study was conducted to analyze 10 new cases of canalicular adenoma (CAD), reviewing medical records and histological slides from 2014-2024.
- - The patients, primarily female with an average age of 61.2 years, presented mostly with solitary, asymptomatic nodules on the upper lip, and some experienced slight pain.
- - The study emphasized distinct microscopic features of CAD and the utility of specific immunohistochemical markers in distinguishing CAD from other types of salivary gland tumors.
Beneath HMGA2 alterations in pleomorphic adenomas: Pathological, immunohistochemical, and molecular insights.
Hum Pathol
October 2024
Department of Pathology, Institut de Pathologie Multisite, Hospices Civils de Lyon, Hôpital Lyon Sud, Pierre-Bénite, France; University of Lyon, Université Lyon 1, Lyon, France; EMR3738, CICLY, Pierre-Bénite, France. Electronic address:
Aims: Most salivary gland neoplasms are distinguished by specific recurrent gene fusions. Recently, a subset of pleomorphic adenomas (PAs) originated from the parotid gland harboring the HMGA2:WIF1 fusion was described with a canalicular adenoma-like morphology and a greater propensity for recurrence and carcinomatous transformation.
Methods And Results: This study delineates the clinicopathological attributes of 54 cases of PAs exhibiting HMGA2 alterations, predominantly characterized by the HMGA2:WIF1 fusion, alongside a comparative analysis of their morphological and immunohistochemical profiles.
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