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  • Title: Oral lipoma: analysis of 58 new cases and review of the literature.
    Author: Manor E, Sion-Vardy N, Joshua BZ, Bodner L.
    Journal: Ann Diagn Pathol; 2011 Aug; 15(4):257-61. PubMed ID: 21447447.
    Abstract:
    Lipomas are common soft-tissue tumors but occur infrequently in the oral region. Here, we present 58 new cases of oral lipoma (OL), their clinical features, diagnostic workup, and management. The records of 58 patients with OL were reviewed. Demographic data, presenting symptoms, primary tumor site, histopathology, and clinical management were analyzed. Extraoral and intraosseous lesions were excluded. The patients were 29 men and 29 women with mean age of 59.7 years, range, 11 to 98 years. Tumor sites included the buccal mucosa (n = 31), tongue (n = 10), lip (n = 6), floor of the mouth (n = 6), and vestibule (n = 5). The mean tumor size was 2.1 cm (range, 0.3-5.0 cm). The mean tumor duration before excision was 2.6 years (31.2 months), ranging from 2 months to 12 years. Most common presenting symptom was an asymptomatic, circumscribed mass. Histologically, the tumors were classified as classic lipoma (n = 28), fibrolipoma (n = 19), intramuscular lipoma (n = 4), minor salivary gland lipoma (n = 2), angiolipoma (n = 2), and spindle cell lipoma (n = 3). A case of spindle cell lipoma affecting the lower lip that has not been described previously is presented. The provided treatment was surgical excision. Although uncommon, OL are most common in adults and very uncommon in children. No sex predilection was found. The buccal mucosa region is the most common site followed by the tongue. Classic lipomas are most common in the oral region and comprise 48% of the tumors. A case of spindle cell lipoma of the lower lip is reported. Its clinical, histologic, and cytogenetic workup is the first well-documented case. Further cytogenetic studies should be undertaken to learn more about the pathogenesis and tumorigenesis of OL.
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