title: Inf lammatory Mass with Fibrinoid Necrosis of Vessels Caused by Methylene Blue Marking of a Colonic Polyp.
abstract: Methylene blue is a relatively non-toxic dye that is used in a variety of procedures including the marking of margins and skin flaps, identifying sinus and fistulous tracts, localizing islet cell tumors, and marking colonic polyps. It has been used intravascularly for the labeling of arteriovenous malformations or to find small bleeding sites. Few adverse effects have been reported with its use. We report an unusual case of an inflammatory mass secondary to transmural injection of methylene blue that resulted in fibrinoid necrosis of arterial media mimicking a necrotizing vasculitis.
authors: Departments of Pathology, Albert Einstein College of Medicine, Bronx, New York, USA; Departments of Department of Laboratories, North Shore University Hospital, Manhasset, New York USA.
authors: A C
authors: AC
authors: Borczuk
authors: Departments of Surgery, Albert Einstein College of Medicine, Bronx, New York, USA.
authors: B
authors: B
authors: Petterino
authors: Departments of Pathology, Albert Einstein College of Medicine, Bronx, New York, USA; Departments of Quest Diagnostics Inc., Teterboro, New Jersey USA.
authors: E
authors: E
authors: Alt