Published online by Cambridge University Press: 19 February 2018
A relationship between malignant growths and mental disturbance has been established in a variety of ways. Some writers have approached the subject from a purely general standpoint. Thus Knapp has noted an increased liability to cancer in individuals who show signs of mental instability and has suggested a possible correlation between the two disorders which are both associated with grave metabolic changes. (1) Proceeding on similar lines, Snow instituted an inquiry which revealed a considerable difference of opinion as to the incidence of cancer in the insane, and concluded that its occurrence is relatively rare. (2)
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