Splenule

An accessory spleen is a small nodule of splenic tissue found apart from the main body of the spleen. Accessory spleens are found in approximately 10 percent of the population and are typically around 1 centimetre in diameter. [Source: Wikipedia ]

Synonyms
Accessory spleen
May Cause
Abnormality on splenic arteriography
Adrenal pseudotumor