The Anatomical Record (Volume 15) (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919. Excerpt: ... By The Bibliographic Service, August 7 AN UNUSUAL RIGHT LUNG MATTHEW MARSHALL Anatomical Laboratories, The School of Medicine, University of Pittsburgh In the course of the regular dissection an unusual right lung was found recently. In brief, its interesting features were: 1. A rudimentary middle lobe so hidden in the interlobular fissure as to make the lung appear two-lobed from a simple surface inspection, and 2. An unusual distribution of the second lateral bronchus. The inferior interlobular fissure did not reach the diaphragmatic surface, but turned around the ventral margin on to the mediastinal surface and thence dorsalward and slightly upward to the hilus. The superior interlobular fissure separating the middle and superior lobes was not evident from the mediastinal surface; that is, there was no evidence of a middle lobe from surface inspection of the mediastinal surface of the lung. On widely divaricating the inferior interlobular fissure, the middle lobe could be seen near the mediastinal surface, lying in a position ventral to a frontal plane passing through the hilus. It was shaped as a biconvex disc about 1 cm. thick, elongated in a dorsoventral direction, with its medial edge very close to and parallel with the mediastinal surface of the lung, and its lateral edge roughly parallel to the medial edge and about 4 cm. from the mediastinal surface of the lung. The dorsoventral length was about 5 cm. It was attached dorsomedially to the hilus, the remainder being covered by pleura except the ventral extremity, which was fused with the superior lobe. Thus it was incompletely separated from the upper lobe by the superior interlobular fissure. The relations of the structures at the hilus were those of a normal right lung. When traced deeply into t...