Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Chronic Necrotizing Aspergillosis
- Radiologic Findings
- Fig 1. Chest PA and lateral shows numerous irregular shaped nodular increased opacities with cavitation.
Fig 2. Lung window setting of the chest CT scan shows consolidative lesions with inner low density, nodules and multiple cavitary lesions in entire both lungs.
Fig 3. Lung window and mediastinal window setting of the chest CT shows aggravation of multiple cavitary lesion and consolidative lesions in both lungs. There are multiple enlarged LNs at mediastinal and both hilar nodal stations.
Aspergillus species grow from percutaneous transthoracic needle biopsy at consolidation of LLL.
- Brief Review
- This type is the chronic granulomatous form of aspergillosis, arising in the setting of mild immunologic compromise and being a progressive form of localized disease. This unusual form of pulmonary aspergillosis resembles clinically a number of other chronic pulmonary diseases including tuberculosis, actinomycosis, histoplasmosis (1).
The patients are usually middle-aged and have poor nutrition due to alcoholism, diabetes mellitus, chronic granulomatous disease or connective tissue disorders. Pulmonary abnormalities resulting in lowered defense mechanisms of the lung such as fibrotic area of mycobacterial infection, chronic obstructive lung disease, previous surgery, radiation therapy, pulmonary infarction or pneumoconiosis may be associated (2).
Clinical symptoms include cough, sputum, fever, weight loss, and hemoptysis, usually persisting at least for a few months. This time course is different from that of invasive aspergillosis (IPA) in which the rate of progression depends on the degree of immunosuppression of host (usually two or three weeks).
Gefter et al (3) reviewed radiographic findings of semi-invasive pulmonary aspergillosis in five patients. They appeared as consolidation or progressing cystic infiltrate subsequently forming a thick-walled cavity and aspergilloma with upper lobe predominance. And pleural thickening was frequently seen.
According to Kim et al (4) in a review of six cases of semi-invasive aspergillosis, the CT findings of the disease were diverse ranging from findings of bronchopneumonia to cavitary consolidation containing an aspergilloma. Main feature distinguishing chronic necrotizing pulmonary aspergillosis from aspergilloma is the presence of obvious tissue invasion and destruction in the former. Whereas, pulmonary aspergilloma usually forms within preexisting cavity without tissue invasion. Pathologically, the findings of angioinvasion are lacking which are characteristic in IPA.
Treatment option depends on the clinical status of the patients; from observation in asymptomatic patients to antifungal therapy or surgical resection in patients with hemoptysis or progressing disease.
- References
- 1. SY Kim, KS Lee, J Han, JG Kim, TS Kim, SW Choo, SJ Kim. Semiinvasive Pulmonary Aspergillosis CT and Pathologic Findings in Six Patients, AJR 2000; 174:795-798
2. Binder RE, Faling LJ, Pugatch RD, Mahasaen C, Snider GL. Chronic necrotizing pulmonary aspergillosis: a discrete clinical entity. Medicine 1982; 61:109-124
3. Gefter WB, Weingrad TR, Epstein DM, Ochs RH, Miller WT. "Semiinvasive" pulmonary aspergillosis: A new look at the spectrum of Aspergillus infections of the lung. Radiology 1981; 140:313-321
4.Cheon J-E, Im J-G, Kim MY, Lee JS, Choi GM, Yeon KM. Thoracic actinomycosis: CT findings. Radiology 1998; 209:229-233
- Keywords
- Lung, Infection, Fungal infection,