Carcinoid syndrome CT

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Parminder Dhingra, M.D. [2]

CT

Peripheral Pulmonary Carcinoid Tumour HRCT Chest

• Most are discovered as an incidental rounded solitary pulmonary nodule.
• The size at diagnosis can vary but usually reported to be range around 10-30mm.
• Many have lobulated margin with an average Hounsfield value on post contrast imaging at around 50.
• Imaging features are often non specific and tissue diagnosis is essential in determining diagnosis.

Bronchial Carcinoid Tumour HRCT Chest

Central lesions are usually seen as:

• A single hilar or perihilar mass which is usually well-defined, round or ovoid.
• Can be of any size but typically range ~2-5 cm.
• There is often marked homogeneous contrast enhancement due to high vascularity.
• Calcification (usually eccentric) can occur but is not a common feature.

Thymic Carcinoids

On CT scan thymic carcinoids usually have heterogeneous attenuation.

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References

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