“…In contrast to pleural mesothelioma, the association of asbestos exposure with pericardial mesothelioma is unclear (Eren and Akar, 2002; Val-Bernal et al, 2002; Lagrotteria et al, 2005; Papi et al, 2005; Luk et al, 2008). Although a few reported cases have occurred in individuals with occupational asbestos exposure (Kahn et al, 1980; Beck et al, 1982; Thomason et al, 1994; Fujiwara et al, 2005), it appears that the vast majority of recently reported cases had no known asbestos exposure (Quinn et al, 2000; Hirano et al, 2002; Reis-Filho et al, 2002; Val-Bernal et al, 2002; Susman et al, 2004; Yakirevich et al, 2004; Erdogan et al, 2005; Lagrotteria et al, 2005; Maruyama et al, 2006; Molina Garrido et al, 2006; Doval et al, 2007; Vornicu et al, 2007; Akamoto et al, 2008; Santos et al, 2008), and many were reported in younger individuals (e.g., age 19–50 years). Malignant mesothelioma of the pleural cavity was also reported to occur in a 15-year old boy with rheumatic heart disease and a prosthetic aortic valve implant; this child was reported to have no history of asbestos or chemical exposure (Tewari et al, 1989).…”