| Summary: | Foram estudados prospectivamente 33 pacientes cujos cistos tinham volume médio de 298,4 + 346,9 (30 - 1700) ml. A punção foi realizada sob anestesia local com agulha 18 gauge, de 20 cm. Após seu esvaziamento, injetou-se etanol absoluto no volume equivalente a um terço do volume aspirado, até o máximo de 100 ml. Os volume médios observados após um, três e seis meses foram 47,9 + 59,4 (0 - 286) ml, 25,2 + 42,8 (0 - 208) ml e 12,7 + 30 (0 - 120) ml, respectivamente. Após esse período, 30 (91%) apresentaram remissão total dos sintomas, 2 (6%) mantiveram os sintomas, sendo um com cisto residual e outro sem cisto e um (3%) apresentou melhora parcial dos sintomas
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A prospective series of 33 patients with symptomatic simple renal cysts varying from 30 to 1700 ml, were considered eligible for the study. The cysts were punctured under local anesthesia with an 18 gauge, 20 centimeters needle. A volume of ethanol equivalent to one third of the aspirated volume, up to a maximum of 100 ml, was injected into the cyst and left there. After one, three and six months, the average volume of the cyst was 47.9 + 59.4 (0 - 286)ml, 25.2 + 42.8 (0 - 208)ml and 12.7 + 30 (0 - 120)ml, respectively. After this period, 30 patients (91%) showed total remission of the symptoms, two patients (6%) maintained them and one patient (3%) had partial remission of the symptoms
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