Mr. Christopher Hollingsworth, Dr. Rafik Abdelsayed, Dr. Mohammed Bindakhil
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引用次数: 0
Abstract
Introduction
Myoepitheliomas (ME) are rare, benign neoplasms composed of myoepithelial cells with a highly variable histologic presentation profile; recognized subtypes include spindle, plasmacytoid/hyaline, epithelioid, and clear. This article presents the largest single-center case series with regards to this neoplasm class. Cases were analyzed with emphasis placed on relevant histological presentation, clinical appearance, and demographics. A 15-year literature review is included as a point of comparison.
Materials and Methods
Institutional case series with accompanying 15-year, retrospective literature review.
Results
Institutional Case Series:</em> </strong>The retrospective search revealed 13 cases of myoepithelial salivary gland tumors—9 benign myoepitheliomas & 4 malignant myoepithelial tumors (included for comparison). Tumor morphology was analyzed—epithelioid pattern, 6 cases (4 benign, 2 malignant); spindle cell pattern, 6 cases (4 benign, 2 malignant); plasmacytoid pattern, 7 cases (6 benign, 1 malignant). The characteristics of connective tissue stroma were also analyzed. The stroma was myxoid in 2 cases (1 benign, 1 malignant), fibrous in 5 cases (4 benign, 1 malignant), and necrotic in 2 cases (2 malignant). The difference in reported clinicopathologic characteristics was not statistically significant, except for the presence of mitosis (p=0.001).
Literature Review
The search revealed 139 records. 32 articles including 34 cases were included. Cell morphology and stromal features were analyzed. The pattern of tumor cells included—epithelioid, 9 cases (29%); spindle cell, 13 cases (41%); plasmacytoid, 14 cases (45%). The stroma was myxoid in 11 cases (40%), fibrinous in 9 cases (33.3%), and necrotic in 2 (7.4%) cases.
Conclusions
Rare salivary gland tumors, especially those arising in atypical locations with ambiguous morphological patterns, present a unique diagnostic challenge. Due to myoepithelioma's ability to manifest in the various glandular structures of the head and neck, dental professionals and physicians who encounter head and neck pathology must recognize this entity as part of their differential diagnosis when clinically appropriate
期刊介绍:
Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology is required reading for anyone in the fields of oral surgery, oral medicine, oral pathology, oral radiology or advanced general practice dentistry. It is the only major dental journal that provides a practical and complete overview of the medical and surgical techniques of dental practice in four areas. Topics covered include such current issues as dental implants, treatment of HIV-infected patients, and evaluation and treatment of TMJ disorders. The official publication for nine societies, the Journal is recommended for initial purchase in the Brandon Hill study, Selected List of Books and Journals for the Small Medical Library.