Multiple laryngeal papillomatosis is a viral disease of the upper airway that primarily affects children. This disorder has malignant potential and may later spread to the tracheobronchial tree.
Solitary papillomas usually are less than 1.5 cm in diameter. They usually are lobar or segmental in location and are histologically similar to viral papillomatosis.
Inflammatory papilloma is a solitary polypoid mass of granulation tissue that is associated with an underlying pulmonary inflammatory condition.
Granular cell myoblastomas are of neural cell origin. A granular cell myoblastoma contains polygonal or spindle cells with granular cytoplasm. Granular cell myoblastomas tend to be multiple in 10% of cases and are more common in men aged 30-50 years.
Other parenchymal tumors occasionally occurring in the endobronchial tree (eg, leiomyoma, lipoma) almost exclusively are found at an endobronchial location.
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Right upper lobe nodule shows peripheral calcification and high Hounsfield unit enhancement, suggesting that the lesion is a calcified, benign pulmonary nodule.
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A 1.5-cm coin lesion in the left upper lobe in a patient with prior colonic carcinoma. Transthoracic needle biopsy findings confirmed this to be a metastatic deposit.
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Mediastinal windows of the patient in the previous image
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Right lower lobe nodule demonstrating central calcification. The most likely diagnosis is histoplasmosis.
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Close-up view of a right lower lobe nodule demonstrating central calcification. The most likely diagnosis is histoplasmosis.
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Left upper lobe cavitating solitary nodule eventually identified as active pulmonary tuberculosis from percutaneous needle biopsy findings.
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A left upper lobe nodule with central lucency and poorly circumscribed margins was diagnosed as actinomycosis based on needle biopsy findings.
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Computed tomography (CT) scan of the patient in the previous image. After needle biopsy, the presence of classic sulfur granules confirmed a diagnosis of actinomycosis.
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A right lower lobe solitary pulmonary nodule that was later identified as a hamartoma.
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Wedge-shaped peripheral (pleural based) density observed secondary to pulmonary infarction (pulmonary embolism). This is termed the Hampton hump.
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Left upper lobe 1.5-cm nodule shows negative computed tomography (CT) scan numbers, suggesting fat in the lesion consistent with hamartoma.
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A left upper lobe solitary pulmonary nodule. The differential diagnosis in such cases is large, but computed tomography (CT) scan findings help to narrow the differentials and establish the diagnosis.
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Cavitating right lower lobe nodule later confirmed to be primary pulmonary lymphoma. Calcium deposits may also be present in the lesion.
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This left lower lobe carcinoid tumor was quite bloody after a percutaneous needle biopsy was performed.
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Lateral radiograph of the patient in the previous image.
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Computed tomography (CT) scan of a patient with a left lower lobe carcinoid tumor shows a well-circumscribed lesion.
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A popcorn calcification in the left lung nodule indicates a benign lesion or hamartoma. No further tests or observations were needed for this patient.
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A 1.5-cm right upper lobe nodule on a computed tomography (CT) scan was determined to be a benign, fibrous lesion on needle biopsy. A follow-up at 2 years showed no change in the size of this lesion.
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The parenchymal lesion in this computed tomography (CT) scan demonstrates low attenuation within the lesion, indicating the presence of fat. Fat density is observed only in hamartoma and lipoid pneumonia. The likely diagnosis is hamartoma
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This patient has a low risk for malignancy of the right upper lobe nodule. Therefore, continued observation with repeat chest radiographs to establish a growth pattern is the best treatment option.
