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The Korean Journal of Pathology 1999;33(11): 1024-1032.
Talc Deposition in Lipoma: A Pathologic and Mineralogic Study.
Jung Ran Kim, Hyun Sul Lim, Hae Kwan Cheong, Ji Yong Kim, Kiyoshi Sakai, Naomi Hisanaga
1Department of Pathology, Section of Cancer Research Medical Institute of Dong Guk University.
2Department of Preventive Medicine, College of Medicine, Dong Guk University, Kyung-Ju 780-714, Korea.
3Department of Environmental Health, Nagoya City Public Health Reserch Institute.
4National Institute of Industrial Health, Ministry of Labor, Japan.
Three cases of lipomas associated with heavy talc deposits are reported in local inhabitants near a fiber glass factory. Pathologic and mineralogical analysis by polarizing microscopy, scanning and transmission electron microscopy with energy dispersive X-ray analysis and X-ray diffraction of mass were done. Simultaneously, we performed an epidemiological survey and a mineralogical study of disposed fiber glass from waste site and ground water. All tumors consisted of mature fat tissue containing an abundant birefringent talc fibers and particles under polarized light. The concentrations of the fibers were 494.7, 6.7 and 50.7 million fibers per gram of dry tissue. The fibers were needlelike with rectangular fractured ends, up to 17 micrometer in length and 0.5 micrometer in diameter. EDX and X-ray diffraction analysis of the fibers showed that 71 to 100% of the fibers were magnesium silicate, talc. We also identified magnesium silicate fibers in the fiber glass from the waste site and in the ground water which were similar to talc fibers in lipomas,. We concluded that fibrous talc, a component of fiberglass waste, might be associated with the development of lipomas via unknown exposure route.
Key Words: Lipoma; Environmental exposure; Talc, Fiber glass; Foreign body