<unk>  is the result of spleen tissue breaking off the main organ and implanting at another site inside the body. This is called heterotopic autotransplantation of the spleen. It most commonly occurs as a result of traumatic splenic rupture or abdominal surgery. Depending on the location of the spleen, the new piece usually implants in another part of the abdominal cavity (including the pelvic cavity). Single case reports also describe<unk>  in the thoracic cavity, in subcutaneous tissue, in the liver or in the cranial cavity.<unk>  must be distinguished from the presence of additional spleens, which are innate and are the result of differences in embryological development. Additionally,<unk>  must be differentiated from malignant tumors which may look similar when imaged.
Splenosis
Atresia
Malocclusion
Subluxation
Anaplasia
Degranulation
Dilaceration
Inspissation