Case Of the Week (COW) 26 April 2015
ENDOBRONCHIAL CARCINOID
Findings
Endobronchial polypoid mass lesion in right main bronchus which is enhancing homogenously post contrast with surrounding lung parenchyma showing post obstructive pneumonitic changes
Discussion
Carcinoid tumor arises from neuroendocrine cells of the bronchial wall (<5% of all pulmonary tumors) Classified as typical and atypical carcinoid Typical carcinoid – low grade malignancy , arises in central bronchi , presents as endobronchial mass and locally invasive Typical carcinoid –may be intra or extraluminal 1.Intraluminal carcinoids cause widening of the bronchus as it approaches the tumor ( toothpaste sign) 2.Extraluminal carcinoids – iceberg lesions Atypical carcinoid – more aggressive and has poor prognosis.
ENDOBRONCHIAL CARCINOID
Findings
Endobronchial polypoid mass lesion in right main bronchus which is enhancing homogenously post contrast with surrounding lung parenchyma showing post obstructive pneumonitic changes
Discussion
Carcinoid tumor arises from neuroendocrine cells of the bronchial wall (<5% of all pulmonary tumors) Classified as typical and atypical carcinoid Typical carcinoid – low grade malignancy , arises in central bronchi , presents as endobronchial mass and locally invasive Typical carcinoid –may be intra or extraluminal 1.Intraluminal carcinoids cause widening of the bronchus as it approaches the tumor ( toothpaste sign) 2.Extraluminal carcinoids – iceberg lesions Atypical carcinoid – more aggressive and has poor prognosis.