Clinical observation of Wilms' tumor.

Forty-two cases with Wilms' tumor encountered in the National Taiwan University Hospital from 1978 through 1989 were retrospectively reviewed. Included were 19 boys and 23 girls, with an age range at diagnosis from 7 days to 10 years; a majority were in the first 6 years of life. The presenting symptoms and signs included: abdominal mass (89.2%), hypertension (57.9%), hematuria (28.2%), gastrointestinal symptoms (26.3%), fever (24.3%), and body weight loss (21.6%). The initial laterality of tumor was 28 right and 14 left, with one contralateral and one ipsilateral relapse. One extrarenal Wilms' tumor (right inguinal lymph nodes) was encountered. Every case was confirmed by pathology. Histologic findings included typical Wilms' tumor (35/42), rhabdoid (3/42), anaplastic (3/42), and clear cell (1/42) types. The common sites of metastasis were lung, liver and bone. Major complications during or following therapy were severe pancytopenia, ileus, sepsis or pneumonia, delayed wound healing and tumor rupture with hemorrhage. Rare complications included irradiation hepatitis (venooclusive disease) and colitis. There were 20 deaths. The causes of death were respiratory or hepatic failure due to tumor metastasis, sepsis and internal hemorrhage. Mortality (19/20) usually occurred within two years after diagnosis and therapy. The two-year's relapse-free survival and two-year's survival rates were 51.2% and 53.7%, respectively.