A Study on the Pathogenesis of Postmastectomy Lymphedema

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Abstract
In order to study the causes of postmastectomy lymphedema, venography, lymphangiography and a radioiodinated serum albumin [RISA] absorption test were performed on the patients following radical mastectomy. Venous obstruction was a rare cause of postmastectomy lymphedema. Edema patterns in arm lymphangiography were observed in the patients with lymphedema and even in some of the non-edematous upper extremities. The finding of axillary lymphangiography was correlated with the degree of edema of the upper extremity. The absence of adequate lymphatic pathway across the axilla (type 2, collateral and type 3, blocking) was thought to provide the pathologic base for the postmastectomy lymphedema. The RISA absorption test also provided precise information on the lymphatic flow in the extremity. It was lower in the patients with edema compared with the patients without edema.

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