A case of anaphylactic shock possibly caused by intravesical Hexvix.

BACKGROUND

We report a case of a 69-year-old Caucasian male who experienced a severe drop in blood pressure and a skin rash after fluorescence cystoscopy and transurethral resection of the prostate. The diagnostic agent used for fluorescence cystoscopy and suspected of causing the anaphylaxis was hexaminolevulinate hydrochloride (Hexvix).

INCIDENT

A profound fall in blood pressure associated with atrial fibrillation, the appearance of a rash, vomiting and transient loss of consciousness occurred immediately after surgery. The hypotension persisted for several hours despite intensive treatment. The reaction commenced approximately 5 h after exposure to Hexvix. There was an increase in serum tryptase (almost nine-fold) and a positive skin prick test to undiluted Hexvix.

CONCLUSION

The mechanism of the anaphylaxis is uncertain, but is considered likely to be a non-immunoglobulin E-mediated allergic reaction possibly caused by Hexvix. This is the first reported case of a severe allergic reaction after intravesical instillation of Hexvix.