“…European publications follow this latter pattern, with the exception ofa Swiss report offour cases (Stahel et al, 1983), a Czech report of 11 cases (Vorreith, 1969), and four cases in a Spanish hospital, presented in two overlapping reports (Guttierez Diaz et al, 1981;del Palacio Hernanz, 1983). Symmers (1966) has seen 'many' examples in referred histological material originating within the British Isles, but does not describe them in detail. Detailed reports are all of single cases (Kurrein, 1954;La Touche et al, 1963;Winston, 1965;Hanley, 1978;Helenglass et al, 1981;Benbow et al, 1985;Flood et al, 1985).…”