MedicineInfectious DiseasesPathologyAutopsy PathologyHematopathologyHistopathologyBone Marrow PathologyBone Marrow PhysiologyHematologic DisordersHematologic PathologyVenous DiseaseBone Marrow HypercellularityInfiltrative Bone Marrow DisordersNew Bone FormationVein Necrosis
Saleeby<sup>1</sup>has recently written of heterotopia of the bone marrow without apparent cause. In 250 necropsies, I found bone marrow filling the intercostal veins in sixty-eight cases. Age or sex had no influence. Twenty-eight were in chronic passive congestion cases from cardiovascular disease. Typhoid in young persons caused death in four cases; acute infections, in eight cases; cancer, in six cases; exophthalmic goiter, hydrophobia, amebic dysentery, Addison's disease and Hodgkin's disease, in one case each. The marrow in the veins was seen not only in the large vein but also in smaller branches on the flat sides of the rib. It corresponded in appearance exactly with the appearance of the marrow in the rib—fatty, cellular or fibrous. In one case, in which there was new bone formed in the rib, there was bone in the marrow filling the intercostal vein. In all the cases the bone showed vital and