A Clinical Analysis of 133 Cases of Pitted Keratolysis / 대한피부과학회지

ABSTRACT

BACKGROUND: Pitted keratolysis (PK) is an acquired, chronic, usually asymptomatic, non-inflammatory, superficial bacterial infection of the stratum corneum of the soles. Corynebacterium species are thought to be the causative organisms of PK. This condition is common in feet of active people wearing sweaty shoes, namely, athletes and soldiers. OBJECTIVE: To analyze the clinical manifestations of pitted keratolysis. METHODS: A total of 133 Korean male soldiers diagnosed with PK (aged between 19 and 33, mean 21.9 years) were included in this study. All patients were investigated between April 2004 and May 2005. Factors investigated included age, location, duration, date of visit, physical examination, subjective symptoms, associated medical conditions, and treatment modalities. All patients were examined carefully to verify accompanying erythrasma or trichomycosis axillaris (TMA). RESULTS: About half of the patients visited our department in spring (March, April, and May). However, PK was found in all the seasons. The ball of the foot was the most frequently involved site (92.5%). The big toe (72.2%) was also a frequent site of involvement. Forty-five patients (41.7%) had coexistent erythrasma, 22 (20.4%) had TMA, and 14 (13.0%) had a simultaneous presence of both erythrasma and TMA. Hyperhidrosis (98.5%) and foul odor (95.5%) were the main complaints in most of the patients. Other symptoms associated with PK were sliminess (38.3%), burning (23.3%), itching (18.8%), and prickling (13.5%) sensations. Various treatment modalities such as topical antibiotics, topical antifungal agents, and oral erythromycin have been used. All lesions subsided within 1 month after treatment. Although recurrence rate was high (64.3%), parameters such as period of prevalence, size and shape of the lesion, and treatment modality were not associated with the recurrence rate. CONCLUSION: The present study provides basic clinical information on PK, which is a common condition of the feet of Korean male soldiers.