[Pulmonary actinomycosis. Diagnostic and therapeutic features].

Introduction: Actinomycosis is a rare suppurative infection, subacute or chronic caused by bacteria of the genus Actinomyces.

Observations: A case study of 4 patients with prolonged respiratory symptoms. The clinical examination was poor in all cases. The CT-scan showed, in all cases, a suspicious tissue mass. The bronchoscopy diagnosis showed, in 2 cases, a tumor budding and was normal for the 2 other cases. Bronchial biopsies were negative in all cases. Before the prolonged symptomatology, the poor general condition, the endoscopic and the CT aspects; there was a suspect around a pulmonary neoplasia diagnosis, thus raising the need of a surgical treatment for diagnostic and therapeutic purposes. The anatomopathological examination of the resected specimen was in favour of the actinomycosis. The aim of these observations is to draw the attention to the radio-clinical, histological, therapeutic and evolutive aspects as well as the diagnostic difficulties of this condition.

Conclusion: The radio-clinical presentation of the actinomycosis is often misleading, thus a diagnostic confirmation is required before any useless surgical resection.