Contrast-Enhanced Helical CT of the Head and Neck
Improved Conspicuity of Squamous Cell Carcinoma on Delayed Scans
Reinhard Groell1,
Otto Doerfler1,
Gottfried J. Schaffler1 and
Walter Habermann2
1
Department of Radiology, University Hospital Graz, Auenbruggerplatz 9, A-8036
Graz, Austria.
2
Department of Otorhinolaryngology, University Hospital Graz, A-8036 Graz,
Austria.
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Fig. 1A. —71-year-old man with recurrent squamous cell carcinoma of
skin. Early (30-sec delay) contrast-enhanced helical CT scan shows poor
opacification of carcinoma (arrows).
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Fig. 2B. —71-year-old man with recurrent squamous cell carcinoma of
skin. Delayed (300-sec delay) contrast-enhanced helical CT scan shows
opacification of carcinoma (arrows) better than A.
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Fig. 2A. —85-year-old woman with metastases from squamous cell
carcinoma of hypopharynx. Early (30-sec delay) helical CT scan reveals
moderate enhancement of lymph node metastases (arrows).
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Fig. 2B. —85-year-old woman with metastases from squamous cell
carcinoma of hypopharynx. On delayed (300-sec delay) helical CT scan,
metastases (solid arrows) show higher enhancement than on A.
Note carotid artery calcifications (open arrow) are visible on
delayed scan.
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Fig. 3A. —65-year-old man with metastatic adenopathy caused by squamous
cell carcinoma of hypopharynx. Early (30-sec delay) helical CT scan shows weak
enhancement of carcinoma (short arrows) and lymph node metastasis
(long arrows).
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Fig. 3B. —65-year-old man with metastatic adenopathy caused by squamous
cell carcinoma of hypopharynx. Delayed (180-sec delay) helical CT scan shows
greater attenuation of carcinoma (short arrows) and metastasis
(long arrows) than A, with better demarcation of metastasis
from sternocleidomastoid muscle.
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Fig. 4A. —47-year-old man with necrotic lymph node metastases
originating from squamous cell carcinoma of soft palate. Early (30-sec delay)
helical CT scan shows weak necrotic rim enhancement (arrows).
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Fig. 4B. —47-year-old man with necrotic lymph node metastases
originating from squamous cell carcinoma of soft palate. On delayed (180-sec
delay) helical CT scan, necrotic rims (arrows) are better delineated
than on A.
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Fig. 5A. —28-year-old man with necrotic lymph node metastases from
esophageal cancer. On early (30-sec delay) helical CT scan, paratracheal mass
(arrows) is visible.
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Fig. 5B. —28-year-old man with necrotic lymph node metastases from
esophageal cancer. Delayed (180-sec delay) helical CT scan shows centrally
necrotic tumor (arrows).
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Fig. 6A. —71-year-old man with benign thyroid nodule. Early (30-sec
delay) helical CT scan shows good demarcation of thyroid nodule
(arrow).
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Fig. 6B. —71-year-old man with benign thyroid nodule. Thyroid nodule
(arrow) is isointense to surrounding thyroid parenchyma on delayed
(180-sec delay) helical CT scan.
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Copyright © 2001 by the American Roentgen Ray Society.
