This 11 page paper discusses nursing theory according to Lydia Hall, which she initially published in 1964. Hall's theory, which is influenced by Carl Rogers' Client-Centered Therapy, asserts that the professional nurse has functions in three overlapping areas: body, pathology/disease and person. Functions in each area overlap but they are also distinct in terms of the activities involved in each. The theory is then used to analyze a case history of a girl with acute leukemia. Bibliography lists 5 sources.