Rudiments of Pathological Histology (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. 1855 edition. Excerpt: ...occasionally with a granular central mass. Towards the periphery of the tubercle, yellowish-brown collections of fat-globules (f) were visible, together with granules either isolated or collected into very small groups. Many tubercular granulations, of the size of millet-seeds, exhibited a slate-grey ring containing sometimes free, large, dark reddish-brown pigment-molecules, sometimes reddish-brown, irregular, flattened corpuscles (retrograde remains of blood). The coloured border might have been formed from blood either extravasated or which had undergone metamorphosis within the vessels, or from hematin which had transuded from them. That a sanguineous congestion of this kind, readily followed by minute extravasations, takes place during the rapid formation of tubercular granulations is also seen in other serous membranes. In fig. 69 is represented a portion of the phrenic pleura. The blood-vessels beneath the serous investment are so congested that a close network of variously convoluted branches is apparent. At a a, are seen two tubercular nodules, transparent by transmitted light, and of a greyish colour. Over these run several delicate vessels, which do not, however, penetrate into the interior of the tubercle. At b, is a somewhat larger nodule divided into two by a transverse extravasation of blood. The hemorrhagic effusions are of very various dimensions, and usually of an oval form; at c, d, e, are seen extravasations of this kind, differing in size; of which those marked e, are scarcely visible to the naked eye. The blood escapes into the subserous tissue, and consequently is covered by the delicate pleura, which prevents the entrance of the blood into the cavity, and by its resistance soon puts a stop to the hemorrhage. Sanguineous...