“…PLATES LXXXIII-XCII ENDOMETRIOID adenocarcinomata are primary neoplasms of the ovary which, on light microscopy, closely resemble adenocarcinomata of the uterine endometrium. These tumours were first described by Sampson in 1925 but only in relatively recent years have they been accepted, not only as a distinct entity (Kottmeier, 1952;Dockerty, 1954; Thompson, 1957 ;Concannon, Veprovsky and Garrow, 1962;Long and Taylor, 1964), but also as one of the more common forms of ovarian cancer (Scully, Richardson and Barlow, 1966; Gray and Barnes, 1967; Santesson and Kottmeier, 1968;Czernobilsky, Silverman and Nikuta, 1970; Kurman and Craig, 1972).…”