대한흉부영상의학회 Korean Society of Thoracic Radiology

Discussion

Diagnosis With Brief Discussion

Differential Diagnosis

1) carcinoid tumor
Wide age range, with a mean patient age of 45 years
Most frequently manifest as a well-defined and round hilar or perihilar mass
Often demonstrate radiologic evidence of endobronchial component
Marked homogeneous contrast enhancement

2) inflammatory pseudotumor
All ages, more frequent in children and adults < 40 years
Most common primary lung mass in children
Variable and nonspecific radiologic findings
Well-defined, lobulated mass with heterogenous attenuation and enhancement (m/c)


3) sclerosing pneumocytoma
Middle-aged women
Usually show smoothly marginated, homogeneously well-enhanced, round or oval nodule or mass
Juxtapleural location (m/c)

Reviewy

Quasi-neoplastic lesion consisting of inflammatory & myofibroblastic spindle cells
Tend to mimic malignant neoplasm clinically & radiologically
Most commonly involves lung and orbit, but can occur in nearly every site in body

m/c primary lung mass seen in children
Constituting ~50% of benign intrapulmonary tumors in pediatric patients
No sex predilection, peak prevalence in 2nd decade of life
Clinical presentation: asymptomatic (m/c), cough, fever, dyspnea

Imaging findings
Variable, nonspecific appearance / usually solitary, peripheral, well-defined, lobulated mass
Occasionally shows consolidation / nodule with ill-defined margin /spiculations mimicking lung cancer
Calcification is unusual & more common in children
Multiple lesions in 5% of cases

Keywords