Pulmonary pseudotumor

Case contributed by Ashesh Ishwarlal Ranchod
Diagnosis certain

Presentation

Known HIV-positive patient with COPD. Ongoing anti-retroviral therapy and tuberculosis treatment. Presents with hemoptysis and septicemia.

Patient Data

Age: 60 years
Gender: Male
x-ray

Hyperinflated lung fields are consistent with a known history of COPD. The trachea is central, with a tracheostomy in situ. The cardiomediastinal contour is normal.

There is a large, elliptiform, mass-like left hemithoracic opacity with sharp borders. There is no cavitation, no associated air-fluid level, no calcification, and no overlying rib erosion.

There is apical bronchovascular distortion consistent with previous pulmonary tuberculosis. There are bibasal effusions.

There is a left subclavian access CVP with overlying ECG leads.

The lateral view is absent, in keeping with a portable and intensive care setting.

ct

CT confirms a left pulmonary pseudotumor with encysted heterogeneous pleural fluid oriented along the left oblique fissure with tapered ends (maximum HU-20). Multiplanar reconstructions assist in making this diagnosis in the absence of a lateral chest view while the patient is in a high-care setting. There are bibasal effusions with atelectasis.

There are hyperinflated lung fields consistent with known COPD, centrilobular and paraseptal emphysema, and pulmonary arterial hypertension.

There is bi-apical bronchovascular distortion, cicatricial emphysema, and right upper lobe chronic granulomas consistent with previous pulmonary tuberculosis. There are calcified left prevertebral and left hilar lymph nodes.

Previous imaging confirmed a tree-in-bud appearance within the right middle lobe and bilateral lower lobes consistent with recurrent/re-infection of pulmonary tuberculosis. The patient was on tuberculosis treatment at the time of this study.

There is a tracheostomy in situ. There are dense secretions/ blood inferior to the tracheostomy in view of the ongoing heamoptysis.

Image courtesy of Dr. K Kobo.

Day 10

x-ray

Follow-up X-rays on day 10 demonstrate a progression of parenchymal changes and a static appearance of the left pseudotumor. There is some resolution of the basal effusions.

Day 17

x-ray

On day 17, there are resolving parenchymal infective changes, improving left pseudotumor, and resolving bibasal pleural effusions.

Day 25

x-ray

On day 25, the left encysted fluid has significantly resorbed, and the pleural pseudotumor appears much smaller. The bibasal pleural effusions have totally resolved with a sharper diaphragmatic contour and normal cardiophrenic and costophrenic recesses. Residual chronic parenchymal changes in a setting of known COPD.

Case Discussion

A case of a large, left pleural pseudotumor due to left oblique fissural encysted pleural fluid with bibasal pleural effusions. The pleural pseudotumor progressively resorbed over a lengthy ICU stay and improved without any percutaneous or surgical drainage.

There is known COPD, with recurrent pulmonary tuberculosis on ongoing treatment. The patient is HIV-positive and on highly active antiretroviral therapy (HAART).

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