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AMA Arch Surg. 1956;73(5):891-893. doi:10.1001/archsurg.1956.01280050159029.
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FIBROSARCOMA of the kidney is an interesting and perplexing tumor. It has no respect for age, nor does it affect one side or one sex more commonly than the other. The presence of a mass in the flank is, as with most renal neoplasms, an important sign. More than 80% of all cases in the literature manifested themselves first as a flank mass. Pain was the next commonest finding, but there were cases in which the fibrosarcoma was a silent, painless tumor. Hematuria was, unfortunately, a late and inconstant finding. The constitutional symptoms of weight loss, malaise, anorexia, and anemia were legion in this group of patients.* We have recently seen a primary fibrosarcoma of the kidney in a 69-year-old woman and were stimulated to review the literature and to consider the pathogenesis, prognosis, and therapy of renal fibrosarcomas.

Report of Case  A 69-year-old woman was admitted to the University


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