“…A mass may be palpable and may be accompanied by pain, usually thoracic but sometimes abdominal ; on the other hand the tumour may be asymptomatic and come to light on routine radiographic examination, like the leiomyofibroma reported by Freedlander and others (1950). Radiography can lead only to a provisional diagnosis ; its inconclusive nature is illustrated by a case discussed by Cass and Mallory (1936). The pre-operative diagnosis was ' tumor of the diaphragm ', but at operation and biopsy the lesion was found to be a primary carcinoma of the liver arising in a cirrhotic liver ; Mallory mentioned two other cases of primary carcinoma of the liver that had similarly elevated the diaphragm.…”