Endoscopy 2010; 42: E128
DOI: 10.1055/s-0029-1243985
Unusual cases and technical notes

© Georg Thieme Verlag KG Stuttgart · New York

A reaction to silicone spray

C.  Grimes1 , P.  Aughwane1 , M.  Klein1
  • 1Department of Surgery, Chase Farm Hospital, Enfield, Middlesex EN2 8JL, UK
Further Information

Publication History

Publication Date:
19 April 2010 (online)

A 50-year-old man underwent surveillance colonoscopy following a right hemicolectomy for a Dukes stage A tumor of the ascending colon 5 years previously. At colonoscopy, an 8-mm polyp was found in the distal sigmoid. A silicone spray was used to assist in snaring of the polyp. The patient immediately developed pain, and the rectum was noted to become erythematous. The patient settled with conservative management. Although some silicone compounds are known to irritate mucous membranes, the active ingredient in silicone spray used in endoscopy, dimethylpolysiloxane is not harmful. However, propane and butane, which are used as propellants in the spray, can cause frostbite and freeze burns. Such sprays should be used with caution in endoscopic procedures.

Fig. 1 Polyp in the distal sigmoid.

Fig. 2 Removal of polyp.

Fig. 3 a, b Erythematous reaction.

Competing interests: None


    C. Grimes

    Department of Surgery
    Chase Farm Hospital

    The Ridgeway
    Enfield, Middlesex EN2 8JL

    Email: carisgrimes@doctors.org.uk