Article

[A case of pulmonary dirofilariasis that required differentiation from nontuberculous mycobacteriosis].

Department of Internal Medicine and Molecular Science, Nagoya City University Graduate School of Medical Sciences.
Nihon Kokyūki Gakkai zasshi = the journal of the Japanese Respiratory Society 06/2006; 44(5):394-8. pp.394-8
Source: PubMed

ABSTRACT A 48-year-old man was admitted with an abnormal shadow on a chest X ray. Chest X ray and CT revealed a solitary nodule in the right lung field. Mycobacterium gordonae was cultured from sputum. Tumorectomy by video-assisted thoracoscopic surgery was done for histological diagnosis, and Dirofilaria worms accompanied with epithelioid cell granuloma with necrosis were found, while no bacteria were cultured from biopsy specimen, thus we diagnosed dirofilariasis. Because a solitary nodule can be caused by either Dirofilaria species or nontuberculous mycobacteria, this case was of interest with regard to the differential diagnosis of a lung solitary nodule.

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Keywords

48-year-old man
 
biopsy specimen
 
chest X ray
 
differential diagnosis
 
Dirofilaria species
 
Dirofilaria worms
 
dirofilariasis
 
histological diagnosis
 
lung solitary nodule
 
necrosis
 
nontuberculous mycobacteria
 
solitary nodule
 
Tumorectomy
 

Takashi Niimi