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Pulmonary dirofilariasis. The largest single-institution experience
W H Risher1, E F Crocker, E N Beckman
1Department of Surgery, Oshsner Clinic, New Orleans, LA 70121.
The Journal of Thoracic and Cardiovascular Surgery
|February 1, 1989
Summary
Pulmonary dirofilariasis, a rare lung condition caused by the dog heartworm (Dirofilaria immitis), often presents as a solitary nodule. Diagnosis requires surgical removal and histologic examination, with increasing prevalence noted.
Area of Science:
- Veterinary Pathology
- Human Pathology
- Parasitology
Background:
- Pulmonary dirofilariasis is an uncommon parasitic lung disease caused by Dirofilaria immitis, the etiological agent of canine heartworm.
- Diagnosis is typically confirmed post-thoracotomy via histological examination of solitary pulmonary nodules.
Observation:
- The Ochsner Clinic reported six cases, representing the largest single-institution series of pulmonary dirofilariasis resections.
- This condition, though rare, is increasingly recognized, with only 70 cases previously reported in the United States.
Findings:
- The study reviews the pathogenesis, clinical presentation, pathology, epidemiology, and geographic distribution of pulmonary dirofilariasis.
- Pulmonary dirofilariasis manifests as a solitary pulmonary nodule, often mistaken for malignancy.
Implications:
- Thoracic surgeons and pathologists must maintain a high index of suspicion for this parasitic infection presenting as a granulomatous pulmonary lesion.
- Increased awareness and diagnostic vigilance are crucial due to the apparent rise in pulmonary dirofilariasis prevalence.