• Splenunculus: this represents ectopic splenic tissue of congenital origin • Wandering spleen: this follows laxity of the suspensory ligament • Polysplenia: the spleen is divided into 2–16 masses • Asplenia (right isomerism): an absent spleen and multiple anomalies are seen within the abdomen and thorax (e.g. situs ambiguous with right sidedness) • Splenogonadal fusion: congenital fusion of splenic tissue and the gonad (usually left sided) • Bacterial abscesses (staphylococci, streptococci or salmonella): this presents with rim-enhancing collections • Mycobacterium tuberculosis: the miliary form spreads by haematogenous dissemination • Fungal infection (candida, aspergillus and cryptococcus): this occurs in immunosuppressed patients
Spleen
MISCELLANEOUS SPLENIC CONDITIONS
NORMAL VARIANTS AND CONGENITAL ANOMALIES
they can be single or multiple and are usually found at the splenic hilum 
they have similar imaging appearances to the spleen
torsion may occur
this is a congenital syndrome associated with situs ambiguous, as well as cardiovascular and visceral anomalies
it usually affects males
SPLENIC INFECTION
there can also be splenic infarcts, peritoneal TB, and adenopathy
it presents with miliary, multifocal low-density lesions demonstrating central high density on CT (‘bull’s eye’ lesions) 
there can be tiny calcifications present (2–5 mm)
laceration 
infarction 
haemoperitoneum 
pseuodoaneurysm formation
it can be congenital (F>M) or secondary to echinococcal infection
it is usually post-traumatic and probably represents an evolved haematoma
