ArticleJournal of cardiothoracic surgery2026
Rapidly growing mediastinal mature cystic teratoma with increased FDG uptake: challenging the paradigm of indolent growth.
Article in Journal of cardiothoracic surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMature cystic teratomas of the mediastinum are typically germ cell tumors with indolent growth, with documented annual growth rates often less than 5 centimeters. We report a case with an abnormal growth rate (Average diameter growth rate 7.14 mm/month) and significant increased 18 F fluorodeoxyglucose (18 F FDG) uptake, which challenges conventional diagnostic concepts. CASE PRESENTATION: A 34-year-old female presented with progressive chest tightness. Serial CT imaging revealed a right anterior superior mediastinal mass that grew from approximately 1.5 cm in long diameter to 6.5 cm over 7 months (Average diameter growth rate 7.14 mm/month). 18 F fluorodeoxyglucose Positron Emission Tomography-Computed Tomography(18 F-FDG PET/CT) revealed the lesion with high metabolic heterogeneity, and the maximum standardized uptake value (SUVmax 6.9). Pathological examination after thoracoscopic-assisted complete resection confirmed the diagnosis of mature cystic teratoma with mature glial components.
conclusionThis case suggests that lesions with rapid growth and significantly increased FDG uptake do not necessarily indicate malignant transformation of teratoma. Multidisciplinary decision-making should be based on dynamic quantitative imaging and metabolic feature analysis.Categories: Pathology, Oncology, Pulmonology.
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