Abstract
BACKGROUND:
Pulmonary metastases are common showing high prevalence in patients with extrathoracic
malignancies and a figure of 20-54% is mentioned according to an autopsy study . As many as
90% of patients with lung metastases have a known extrathoracic primary tumor or symptoms of a
synchronous primary tumor and chest symptoms are usually absent in patients with multiple
metastases (80-95%).
AIM OF STUDY:
To elucidate the most common findings detected by chest CT in patients with pulmonary
metastases, to be familiar with in the management & follow-up of these patients.
METHODS:
The study was conducted on forty-two patients with definite primary extrathoracic malignancies
by chest spiral CT(SOMATOM PLUS 4 by Siemens medical systems), those with multiple
pulmonary metastatic nodules were selected. Data were collected regarding CT characteristics of
the pulmonary nodules and the extraparenchymal chest lesions involving the pleura, lymph nodes
and of chest wall bones.
RESULTS:
The forty-two patients (twenty-seven females and fifteen males), 81% of them were above forty
years. The most common (59.5%) primary tumor was breast carcinoma .All patients had
pulmonary nodules enhancing more than 20 Hounsfield units (HU) and (59.5%) of them showed
nodule enhancements ranging from 30HU to 50HU.Cavitatng and calcified pulmonary nodules
were seen in 9.5% and 2.4% of all patients respectively. Extraparenchymal chest lesions were
found collectively in 33.3% of all patients, the most common finding of which were pleural
effusion and intrathoracic lymphadenopathy (14.2% and 9.5% respectively), while bone metastases
was shown in 7.1% of patients.
CONCLUSION:
We concluded that the most common findings detected by chest CT in patients with pulmonary
metastases are the enhancing nodules with enhancements of more than 20 Hounsfield units & the
extra-parenchymal chest lesions, while other findings like cavitation and calcification are unusual
and occur with certain primary tumors.
Pulmonary metastases are common showing high prevalence in patients with extrathoracic
malignancies and a figure of 20-54% is mentioned according to an autopsy study . As many as
90% of patients with lung metastases have a known extrathoracic primary tumor or symptoms of a
synchronous primary tumor and chest symptoms are usually absent in patients with multiple
metastases (80-95%).
AIM OF STUDY:
To elucidate the most common findings detected by chest CT in patients with pulmonary
metastases, to be familiar with in the management & follow-up of these patients.
METHODS:
The study was conducted on forty-two patients with definite primary extrathoracic malignancies
by chest spiral CT(SOMATOM PLUS 4 by Siemens medical systems), those with multiple
pulmonary metastatic nodules were selected. Data were collected regarding CT characteristics of
the pulmonary nodules and the extraparenchymal chest lesions involving the pleura, lymph nodes
and of chest wall bones.
RESULTS:
The forty-two patients (twenty-seven females and fifteen males), 81% of them were above forty
years. The most common (59.5%) primary tumor was breast carcinoma .All patients had
pulmonary nodules enhancing more than 20 Hounsfield units (HU) and (59.5%) of them showed
nodule enhancements ranging from 30HU to 50HU.Cavitatng and calcified pulmonary nodules
were seen in 9.5% and 2.4% of all patients respectively. Extraparenchymal chest lesions were
found collectively in 33.3% of all patients, the most common finding of which were pleural
effusion and intrathoracic lymphadenopathy (14.2% and 9.5% respectively), while bone metastases
was shown in 7.1% of patients.
CONCLUSION:
We concluded that the most common findings detected by chest CT in patients with pulmonary
metastases are the enhancing nodules with enhancements of more than 20 Hounsfield units & the
extra-parenchymal chest lesions, while other findings like cavitation and calcification are unusual
and occur with certain primary tumors.
Keywords
Chest CT .
Multiple Pulmonary Nodules
Pulmonary Metastases