Primary actinomycosis of hand

[Atypical bacterial Infections of the Hand]

Atypical infections of the hand are rare and often misdiagnosed. Delay of treatment can lead to irreversible damage, even life-threatening sepsis. The article provides a survey of some of the most frequent atypical infections and their appearance on the hand (Mykobakteria, Vibriones, Francisella, Actinomycetoma), illustrated by two case reports. Knowing the pathogenesis of the most frequent atypical infections allows considering them in the daily practice for differential diagnosis, initiate specific testing, and administer an adequate therapy at an early stage.

Actinomycotic Osteomyelitis of the Hand and Wrist Treated with Pharmacotherapy Alone: A Case Report

CASE

Primary infection by Actinomyces is uncommon because susceptibility to infection requires breakdown of the normal protective mucosal barrier. Furthermore, involvement of the upper extremity is rare. This case report presents clinical, radiological, and pathological findings in a 26-year-old patient with actinomycosis of the hand that was treated successfully by pharmacotherapy alone without any surgical debridement.

CONCLUSION

Primary actinomycoses of the hand and upper extremity present as a challenging condition. It requires a high index of clinical suspicion and histopathologic diagnosis to guide treatment, typically involving antimicrobial therapy. This case highlights the usefulness of conservative treatment with antimicrobial therapy without surgical debridement.

Olecranon Osteomyelitis due to Actinomyces meyeri: Report of a Culture-Proven Case

Actinomyces meyeri is a Gram positive, strict anaerobic bacterium, which was first described by Meyer in 1911. Primary actinomycotic osteomyelitis is rare and primarily affects the cervicofacial region, including mandible. We present an unusual case of osteomyelitis of a long bone combined with myoabscess due to A. meyeri. A 70-year-old man was admitted for pain and pus discharge of the right elbow. Twenty-five days before admission, he had hit his elbow against a table. MRI of the elbow showed a partial tear of the distal triceps tendon and myositis. He underwent open debridement and partial bone resection for the osteomyelitis of the olecranon. Biopsy showed no sulfur granules, but acute and chronic osteomyelitis. The excised tissue grew A. meyeri and Peptoniphilus asaccharolyticus. Intravenous ceftriaxone was administered and switched to oral amoxicillin. Infection of the extremities of actinomycosis often poses diagnostic difficulties, but it should not be neglected even when the characteristic pathologic findings are not present.