In view of the enlarging splenic mass, the patient underwent splenectomy.
Pathology report:
Splenectomy specimen, 196g, 110 x 90 x 35mm, with attached perisplenic adipose tissue, 40mm. There is some poorly defined pallour, 10mm, located in the lower pole. The remaining splenic parenchyma appears normal.
MICROSCOPY: Spleen, splenectomy: Non-encapsulated proliferation of anastomosing blood filled sinuses, with positive immunoreactivity for CD31 and CD8. CD68 is negative. The background spleen appears unremarkable. No atypical features seen.
The differential diagnosis lies between a benign hemangioma and hamartoma/splenoma, the latter being favoured in view of CD8 positivity.