Carcinoid syndrome CT

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [2]Associate Editor(s)-in-Chief: Parminder Dhingra, M.D. [3]

Overview

Chest CT scan may be helpful in the diagnosis of carcinoid tumor. On high-resolution CT scan of the chest, peripheral pulmonary carcinoid tumor is characterized by a solitary and round pulmonary nodule with a lobulated margin, whereas bronchial carcinoid tumor is characterized by a single well-defined, round or ovoid, hilar or perihilar mass with marked homogenous enhancement. On CT scan of the neck, thymic carcinoid tumor is characterized by a mass with heterogeneous attenuation.

CT

Peripheral Pulmonary Carcinoid Tumor High-Resolution CT Chest

Findings on high-resolution CT scan suggestive of peripheral pulmonary carcinoid tumor include:

• Discovered as an incidental solitary and round pulmonary nodule
• Size at diagnosis can vary but ranges between 10-30 mm
• Lobulated margin

Bronchial Carcinoid Tumor High-Resolution CT Chest

Findings on high-resolution CT scan suggestive of bronchial carcinoid tumor include:

• Well-defined single hilar or perihilar mass
• Round or ovoid in shape
• Variable in size but typically ranges between 2-5 cm
• Marked homogeneous contrast enhancement due to high vascularity
• Calcification (usually eccentric) can occur

Thymic Carcinoid

Findings on neck CT scan suggestive of thymic carcinoid tumor include:

• Mass with heterogeneous attenuation

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