The characteristics of silk as a surgical suture have been known for many years and need not be reviewed extensively, as excellent summaries are available.1-4 Silk granuloma and extrusion have been attributed to simple foreign-body reaction, excessively large sutures, infection, allergy, or the dye or coating on the suture.5 Recently Bahnson, Spencer and Bennett6 described persistent staphylococcal infection about silk sutures used in 5 operations on the heart and great vessels. A second major procedure was necessary to remove the infected silk, after which the patients promptly recovered. Disturbing reports such as this stimulate the continued search for a better surgical suture. Several of the new synthetic suture materials have been found to incite less tissue reaction than silk, and Teflon has been noted to be especially innocuous.7-9 Although the degree of tissue reaction is certainly not the underlying cause of all suture complications, these would