RESUMEN
BACKGROUND: Nutritional disorders in cancer patients, including lymphoproliferative neoplasms, occur with varying frequency. OBJECTIVES: The primary aim of the study was to analyze the changes in the nutritional status of patients with lymphoproliferative neoplasms following first-line chemotherapy. MATERIALS AND METHODS: 46 patients, with a median age of 62 years, participated in a prospective single-center study. Their demographic, biochemical and clinical features were analyzed. The study consisted of several stages that were conducted at two time points. P values < 0.05 were considered statistically significant. RESULTS: The study included patients with multiple myeloma (48%), non-Hodgkin's lymphoma (28%) or chronic lymphocytic leukemia (24%). After the end of the first-line chemotherapy, a decrease in the concentration of albumin (p = 0.04), transferrin (p = 0.38) and total cholesterol (p = 0.76) were found. Statistically greater unintended weight loss occurred before treatment initiation (p < 0.001). Moreover, a significant decrease in the mean values of the phase angle (p < 0.01) was noted. CONCLUSIONS: Most patients before the oncological therapy did not show clinical or biochemical symptoms of malnutrition. However, after the treatment was completed, the parameters of the nutritional status showed its deterioration.