Normal mediastinal lymph node size and shape; CT and cadaver study

Abstract

W ith the view point of size, shape and arrangement pattern, authors p resent normal mediastinal Iymp h node fro m t he analysis of 61 cases of (T scan and multidirectional section of 2 cadave rsThe res ul ts we re as fo ll ows:1. Transverse diameter of the Iymph nodes, demonstrated in 'cadaver secti。π was 3 to 6mm in upper paratracheal area and 5 to 14mm in juxta-carinal and AP-window area' Arrangement of the Iymph nodes showed tendencly 。f longitudinal direction in lower paratracheal, and juxtacarinal area, w hile that of AP window showed tendency of AP direction as long axis.2. Mean and the largest size of the Iymph nodes demonstrated in CT scan were 3.7mm, 8mm in upper paratracheal area, and 6mm, 12mm in lower paratracheal area, and 7.1mm, 14mm in juxtacarinal area, and 6.3mm and 11mm in aorti cop 비 monary window area 3. Size of the Iymph nodes in CT scan showed linear increas ing tendency accord ing to increasing age (y=O.32, P<O.005) 4. Shape of the Iymph nodes in CT scan were mostly round in upper paratracheal area while that of aort icopu lmonary window showed higher incidence of oval and elongated shape 5. Recommended size criterior of abnormal Iymph node is 10mm in upper paratracheal area and 15mm in the other area.