A study of the effectiveness of chemosurgery with trichloroacetic acid for Japanese cedar pollenosis in terms of the chemical mediator levels in the nasal discharge and results of nasal provocation testing.
OBJECTIVE
The purpose of the present study was to investigate the effectiveness of chemosurgery with 80w/v% trichloroacetic acid (TCA) for the treatment of Japanese cedar pollenosis. The effectiveness of this treatment was evaluated in terms of the levels in the nasal washings of the chemical mediators histamine and eosinophil cationic protein, and the reactivity in the nasal provocation test.


METHODS
Patients of cedar pollenosis were divided into two groups, the TCA-treated group (n=90) and the group that was not treated with TCA (nonTCA-treated group) (n=79), according to whether or not they received TCA treatment. In both the groups, the levels of the two aforementioned mediators in the nasal washings were measured during the pollen dispersal season. In addition, allergen provocation tests were performed using the disk method in volunteers from both the groups during the non-pollen dispersal season. The results of the above two determinations were compared statistically between the two groups.


RESULTS
The results revealed significantly lower levels of the two mediators in the TCA-treated group than in the nonTCA-treated group (p<0.01). There was also a greater tendency for the subjects in the TCA-treated group as compared to those in the nonTCA-treated group to show negative reactivity in the allergen provocation test (p<0.01).


CONCLUSIONS
Regional suppression of the allergic reaction to Japanese cedar pollen appears to occur as a result of chemosurgery with TCA performed as a day surgery.
Yao
Kazuo
K
Department of Otorhinolaryngology, Kanagawa Dental College at Yokohama, 3-31-6, Tsuruya-chou, Kanagawa-ku, Yokohama-shi, Kanagawa-ken 221-0835, Japan. yaokazuo@med.kitasato-u.ac.jp
Sato
Kentaro
K
Usui
Daisuke
D
Kurihara
Rika
R
Iguchi
Yoshiaki
Y
Nishiyama
Koichiro
K
Tianyi
Liu
L
Kamijo
Takahiro
T
Masaki
Takashi
T
Okamoto
Makito
M
D000328:Adult; D002424:Caustics / Q000627:therapeutic use*; D028203:Cedrus; D004797:Enzyme-Linked Immunosorbent Assay; D047150:Eosinophil Cationic Protein / Q000032:analysis; D005069:Evaluation Studies as Topic; D005260:Female; D006632:Histamine / Q000032:analysis; D006801:Humans; D008297:Male; D009297:Nasal Mucosa / Q000737:chemistry; D009299:Nasal Provocation Tests; D011058:Pollen; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*; D016896:Treatment Outcome; D014238:Trichloroacetic Acid / Q000627:therapeutic use*
D002424:Caustics; D014238:Trichloroacetic Acid; D006632:Histamine; D047150:Eosinophil Cationic Protein