[Efficacy of tonsillectomy for improving skin lesions of Pustulosis palmaris et plantaris--evaluation of 289 cases at the Department of Otolaryngology of Sapporo Medical University].

In recent years, Pustulosis palmaris et plantaris (PPP) has been described as one of the representative second lesions of focal tonsillitis in Japan. We selected 289 cases of PPP, treated with bilateral tonsillectomy at our department over the past 12 years for this clinical evaluation. In 211 of those 289 tonsillectomy cases, follow-up was done for more than 3 months after operation. Prior to tonsillectomy, 196 cases suffered from PPP only, 90 cases had the complication of osteo-arthral lesions such as sterno-costa-clavicular hyperosteosis (SCCH), rheumatoid arthritis, and soon, whereas only 3 cases showed simultaneous lesions of Psoriasis vulgaris. The efficacy of tonsillectomy for improving the skin lesions was classified into 6 grades, mainly based upon individual evaluation by each patient as follows; disappeared, remarkably improved, improved, slightly improved, unchanged, and worsened. According to our 211 cases, post tonsillectomy improvement of skin lesions was very obvious, with disappearance occurring in 54.3% of cases and remarkable improvement in 21.4%. Age of onset and the duration from onset to tonsillectomy showed no association with effectiveness. However, the shorter the duration from onset to tonsillectomy, the fewer days were required for improvement of the skin lesions. The rate of improvement of PPP rose in conjunction with the number of days after tonsillectomy. We conclude that it requires 12 months, at minimum, to determine the efficacy of tonsillectomy as a treatment for PPP.