Sclerosing angiomatoid nodular transformation (SANT) - spleen
Incidental finding of a splenic mass during ovarian cyst follow-up.
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A well-circumscribed splenic mass with heterogeneous low signal intensity on T1WI, low signal on the T2WI image and mild peripheral enhancement during the arterial phase.
The differential diagnosis of a splenic mass is broad and includes benign and malignant entities. Hemangiomas are the most common benign primary neoplasm of the spleen, but they have high signal intensity on T2WI. Angiosarcomas have a high T2 signal intensity too, and they often have a cystic area, which in SANT have not been reported.
Thus, a well-circumscribed splenic mass showed low signal intensity on T1 and T2WI, is suggestive of sclerosing angiomatoid nodular transformation of the spleen (SANT).