“…There is good radiological and postmortem evidence that this occurs both by direct invasion from adjacent lymph nodes and by lymphatic or haematogenous dissemination from distant sites (Filly et al, 1976;Robbins, 1953;Stolberg et al, 1964;Vieta & Craven, 1941). However, histological evidence of early intrathoracic spread has been inadequate compared with that available for the involvement of the intrabdominal organs (Kaplan, 1980;Peckham, 1973;Rosenberg et al, 1961;Sugarbaker & Craven, 1940;Filly et al, 1976;Robbins, 1953;Stolberg et al, 1954;Vieta & Craven, 1941;Goffinet et al, 1977).…”