ABSTRACT
Radiological evaluation of response to chemotherapy can be carried out by applying the RECIST (Response Evaluation Criteria in Solid Tumors) criteria, currently considered the most objective method for monitoring lesions. Aimed at finding a general response curve, 21 patients with lung and kidney tumors, as well as colorectal carcinoma were studied between 2006 and 2008. Statistical proceedings included variance (ANOVA), co-variance (ANCOVA) and logarithmic regression analysis. Target-lesion size reduction, duration of response and overall response of different types of tumors did not differ significantly A general response curve was obtained: log (RR)= 1,897-0,0281, where RRt is the relative RECIST count, and t is time (expressed in months). As an expected outcome -because of variety of drugs, type of tumors and variability rates in individual response- the determination coefficient in regression was 10.9 percent. However, it constitutes a first approach to solid tumors response and proves the accuracy and usefulness of RECIST methodology.
La evaluación radiológica de respuesta a la quimioterapia se puede hacer con el criterio RECIST, considerado actualmente el método más objetivo de seguimiento de lesiones. Con el objetivo de buscar una curva general de respuesta, entre los años 2006 y 2008 estudiamos 21 pacientes con tumores pulmonares, renales y cáncer colo-rectal. La estadística consistió en análisis de varianza (ANOVA), covarianza (ANCOVA) y regresión logarítmica. La reducción en tamaño y el tiempo de respuesta no difirieron significativamente, así como tampoco la respuesta global de los diferentes cánceres. Se obtuvo una curva general de respuesta: log (RR)= 1,897 -0,028 t, (RR= evaluación RECIST actual dividida por inicial y t= tiempo en meses). El coeficiente de determinación de la regresión fue 10,9 por ciento, esperable por la diversidad de fármacos, tipo de tumor y respuesta individual; sin embargo constituye una primera aproximación a la respuesta esperada mostrando la utilidad y objetividad del método.
Subject(s)
Humans , Male , Adult , Female , Middle Aged , Colorectal Neoplasms/drug therapy , Colorectal Neoplasms , Lung Neoplasms/drug therapy , Lung Neoplasms , Kidney Neoplasms/drug therapy , Kidney Neoplasms , Analysis of Variance , Antineoplastic Agents/therapeutic use , Disease Progression , Dose-Response Relationship, Drug , Regression Analysis , Tomography, Spiral ComputedABSTRACT
Primary malignant lymphomas of the bladder are infrequent. We report a 70 years old woman presenting with hematurla, dysuria, malaise and a 5 Kg weigbt loss. Pelvic ultrasound examination showed a 8x8x8 cm solid and cystic mass adjacent to the bladder and uterus. Cytoscopic biopsy disclosed a low grade B cell non Hodgkin lymphoma. She was treated with 6 cycles of chemotherapy with disappearance of the mass. Two years after admission, the patient is free of disease