Sinonasal Intestinal-Type Adenocarcinoma

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Sinonasal Intestinal-Type Adenocarcinoma Involvement of the Paranasal Sinuses

The differential diagnosis of anterior skull-base masses extending

intracranially includes squamous cell carcinoma, lymphoma,

esthesioneuroblastoma, sinonasal melanoma, metastasis, aggressive infection

(especially fungal infection), and ITAC. Esthesioneuroblastoma and squamous cell

carcinoma usually do not have extreme hypointensity, as seen in our case.

Lymphoma may have hypointensity on T2-weighted images but not to the degree seen

in our case. An aggressive fungal infection or a sinonasal melanoma could have

similar signal-intensity characteristics, especially since these last two

entities may have associated hemorrhage. A metastasis may have similar imaging

characteristics, especially if it is hemorrhagic

http://www.ajnr.org/cgi/content/full/24/6/1152

cited abstract

http://www.ajnr.org/cgi/content/abstract/24/6/1152