Under the term "cancer erythema" Jonathan Hutchinson in 1886 described the affection which we now designate carcinoma erysipelatodes, which is perhaps most commonly and most readily seen in relation to cancer of the breast.
Cancer may spread directly or by the lymphatics, with or without obstruction and consequent edema. It is thought by Muir and others sometimes to spread in the epithelium itself, giving rise to intraepidermal carcinoma, though this is known also commonly to arise in situ. Embolic spread by lymphatics or blood vessels may give rise to distant metastases.
Upon occasion, however, cancer cells grow in and are transported along vessels without invading or penetrating the walls of those vessels. Such spread may naturally be rapid and extensive without at first giving rise to much in the way of signs or symptoms unless it involves the skin and subcutaneous tissues (Dawson and
INGRAM JT. Carcinoma Erysipelatodes and Carcinoma Telangiectaticum. AMA Arch Derm. 1958;77(2):227–231. doi:10.1001/archderm.1958.01560020081011