[Electron microscopic demonstration of spirochete-like structures in acrodermatitis atrophicans Herxheimer].
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Acrodermatitis chronica atrophicans is a dermatological condition that takes a chronically progressive course and finally leads to a widespread atrophy of the skin. Involvement of the peripheral nervous system is frequently observed, predominantly a sensory polyneuropathy. General reactions, the effect of penicillin treatment, the histological findings, and reports concerning a communicable agent transmittable from human to human as well in tissue cultures point to an infectious disease. Acrodermatitis chronica atrophicans follows a peculiar geographical distribution forming clusters of high prevalence in certain regions. Transmission by ticks is suggested.
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Two cases of acrodermatitis chronica atrophicans associated with Borrelia burgdorferi infection are reported; to our knowledge these are the first cases reported in children.
Erythema chronicum migrans and acrodermatitis chronica atrophicans are both recognized to be lesions associated with Lyme disease, although they are thought to be distinct entities. In this paper, the clear evolution of erythema chronicum migrans into acrodermatitis chronica atrophicans is demonstrated.
BACKGROUND: Acrodermatitis chronica atrophicans is a delayed manifestation of Lyme disease caused by a Borrelia burgdorferi subspecies, B. afzelii. Although rheumatic manifestations are rare, they can result in deformities of the fingers and toes if they are not treated promptly. METHODS: We report four cases of acrodermatitis chronica atrophicans seen over a 15-year period. RESULTS: Two patients had a noninflammatory unilateral knee effusion and one had swelling of the dorsum of one hand. Antimicrobial therapy was followed by a full recovery in the three patients who received an early diagnosis. The remaining patient, a 63-year-old woman, had swelling and dysesthesia in the fingers of both hands. She developed finger deformities over a period of two years. Although the swelling resolved under antimicrobial therapy, she had persistent reducible deformities of the fingers consistent with Jaccoud's arthropathy. CONCLUSION: The diagnosis of acrodermatitis chronica atrophicans rests on a history of a tick bite, a suggestive skin biopsy histology and a positive Western blot for B. afzelii. A positive response to antimicrobial therapy is also required. Acrodermatitis chronica atrophicans, a common condition in central and northern Europe, can cause joint manifestations and persistent finger deformities in the absence of early treatment.
To determine the most effective treatment for acrodermatitis chronica atrophicans, several clinical trials were undertaken in recent years to evaluate whether a 2-week course of ceftriaxone would be superior to oral antibiotics. Of the 46 patients suffering from acrodermatitis chronica atrophicans, 14 were treated with ceftriaxone 2g for 15 days. The remaining patients received either oral penicillin V 1.5 million IU t.i.d. or doxycycline 100 mg b.i.d. for 20 to 30 days. Patients were followed up for at least 1 year. Of the 14 ceftriaxone-treated patients four showed incomplete regression of the inflammatory skin changes after 6 to 12 months. Two out of five patients who were monitored for Borrelia burgdorferi DNA excretion were still positive after 12 months as compared to none of six patients who were treated orally for 20-30 days. Six out of 11 patients treated orally for only 20 days needed retreatment after 6 months because of continuing skin manifestations, neuropathy or arthralgia. A 30-day duration of treatment with oral antibiotics and not the chosen antibiotic is crucial for curing acrodermatitis chronica atrophicans. The duration of treatment with ceftriaxone needed for eradication of Borrelia in acrodermatitis chronica atrophicans has yet to be determined in future studies.
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