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Mass-to-splenic volume ratio and splenic weight as a percentage of body weight in dogs with malignant and benign splenic masses: 65 cases (2007-2008).

OBJECTIVE
To determine whether mass-to-splenic volume ratio or splenic weight as a percentage of body weight was significantly different between dogs with benign versus malignant splenic masses.


DESIGN
Retrospective case series.


ANIMALS
65 dogs that underwent splenectomy.


PROCEDURES
Medical records of dogs examined between October 2007 and June 2008 because of a splenic mass were reviewed. Information obtained included dog age, breed, and weight; whether hemoperitoneum was present; splenic weight and dimensions (length, width, and height) at the time of splenectomy; dimensions (length, width, and height) of the splenic mass; and histologic diagnosis. Information on survival time was recorded when available.


RESULTS
30 (46%) dogs had hemangiosarcoma, 10 (15%) had other types of malignant masses, and 25 (39%) had benign masses. Dogs with benign splenic masses had a significantly higher mean mass-to-splenic volume ratio and higher mean splenic weight as a percentage of body weight than did dogs with hemangiosarcoma.


CONCLUSIONS AND CLINICAL RELEVANCE
Results suggested that mass-to-splenic volume ratio and splenic weight as a percentage of body weight may be useful in differentiating between hemangiosarcoma and benign lesions in dogs with splenic masses.