RESUMEN
Los aneurismas de la vena poplitea son entidades raramente diagnosticadas. Una revision bibliografica de esta patologia, demuestra que su presencia ha sido verificada en un alto porcentaje (>95%), despues de episódios de tromboembolismo pulmonar recurrente (TEP), trombosis venosa profunda (TVP) o en el estúdio del sindrome postrombotico (SP). El presente caso, tuvo como manifestacion clinica, edema y dolor de la pantorrilia. El diagnostico fue realizado con resonancia magnética y confirmado con flebografía. La lesion corregida quirurgicamente con aneurismectomia tangencial y venorrafia lateral. Se utilizo anticoagulacion solo durante la operacion. Consideramos que esta no debe ser utilizada en el postoperatorio de casos como el actual, en los que sintomas de trombosis venosa profunda o TEP no han sido manifíestos. Treinta y cuatro casos de aneurismas venosos popliteos incluyendo el presente, han sido publicados hasta Ia presente fecha. De estos, 68% (17/25) se manifestaron con TEP, 96% se localizaron en la vena proximal (24/25). Todos los casos exceptuando dos han sido diagnosticados con flebografia ascendente. Creemos, al igual que ostros autores, que este tipo de lesion anatomica, debe ser corregida quirurgicamente, por la alta incidência de fenômenos tromboembolicos sin respuesta adecuada ai tratamiento convencional con anticoagulantes.

UNITERMOS
Aneurismas de la vena poplitea; Aneurismectomia tangencial; venorrafia lateral.

SUMMARY
Popliteal venous aneurysms are entities that are rarely diagnosed. A bibliographic review of this pathology would show that its presence has been verified in a high percentage (95%) after episodes of recurrent pulmonary thromboembolism (PE), acute deep venous thrombosis (DVT), or in the study of the posthrombotic syndrome (PS). The present case showed clinical signs of edema and pain of the left lower limb. The diagnosis was done with magnetic angioresonance and confirmed with phlebography. The lesion was corrected surgically with a tangencial aneurysmectomy and lateral venorrhaphy. Anticoagulation was used only during the operation. We believe that heparin should not be used in the postoperative of patients like the present case or in those where symptoms of DVT or PE have not been manifested. Thirty four cases of popliteal venous aneurysm including this case have been published at the present time. Of these cases, 68% (23/34) have shown PE; 96% occurred in the proximal popliteal vein (32/34). Ali cases except two have been diagnosed with ascending phlebography. We believe as do other authors, that this type of anatomic lesion should be corrected surgically, because of the high incidence of thromboembolic phenomenon that does not respond to conventional therapy with anticoagulants.

UNITERMS
Popliteal venous aneurysms; Tangencial aneurysmectomy; Lateral venorrhaphy.