Renal vein thrombosis in cases

Renal vein thrombosis has been divided into four main groups (Harrison, Milne, and Steiner, 1956): it may be secondary to thrombosis or obstruction of the inferior vena cava; it may occur as a primary renal vein thrombosis; or it may complicate renal disease. Many renal diseases have been associated with renal vein thrombosis, including renal amyloidosis, glomerulonephritis, pyelonephritis, and malignant hypertension (Harrison et al, 1956). It is the purpose of this paper to report two cases of renal vein thrombosis, one complicating polyarteritis nodosa, the other the Henoch-Schoenlein syndrome, and to indicate a possible factor in the production of venous thrombosis in these conditions.