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DESCRIPTION:
CXR (17 DEC01):
Ill-defined density overlying the lower thoracic vertebrae with obscuration of the posterior left hemidiaphragm. The posterior wall of the bronchus intermedius lies anterior to the left mainstem bronchus.
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| LEFT LOWER LOBE COLLAPSE - |
| Lateral : XR - Plain Film CXR (17 DEC01):
ACR Code: 65 . 748 |
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» Review Images |
History:
62 y/o woman who complains of two-week history of cough and hemoptysis. Exam:
Not Provided Image Findings:
CXR (17 DEC 01): On the frontal view there is left retrocardiac density, which obscures the descending thoracic aorta. Additionally the left mainstem bronchus and left hilar structures are inferiorly displaced. Band-like density adjacent to left heart border is consistent with plate atelectasis. On the lateral view there is ill-defined density overlying the lower thoracic vertebrae with obscuration of the posterior left hemidiaphragm. The posterior wall of the bronchus intermedius lies anterior to the left mainstem bronchus. CXR (30 JAN 02): Frontal and lateral views demonstrate resolution of left lower lobe collapse and lingular plate atelectasis. CT (05 MAR 02): Not shown. Study was normal with no evidence of tracheal or bronchial abnormalities. Differential Diagnosis:
Actual Diagnosis:
LEFT LOWER LOBE COLLAPSE How Was Dx Confirmed:
Treatment and Outcome:
Patient Discussion:
In the abscence of causitive lesion on the CT scan the cause of the left lower lobe atelectasis is felt to be on the basis of mucus plugging Lower lobe collapse may involve the whole lobe, however the superior segment is frequently spared. With collapse the major fissure rotates posterior and medially and the upper half of the fissure deviates inferiorly. Consequently the collapsed lobe lies posteromedially in the thoracic cavity adjacent to the diaphragm and mediastinum. If the inferior pulmonary ligament does not attach to the diaphragm, the lobe is positioned against the mediastinum with little if any contact with the diaphragm.
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