ABOUT T-STAT
Tufts Splenic Tumor Assessment Tool (T-STAT) was developed at Tufts Cummings School of Veterinary Medicine for estimating the probability of malignancy in individual dogs with splenic masses. The calculation is based on a multivariable analysis of data from 422 dogs with splenic masses that were treated at our institution.

Each use of T-STAT requires a licensed veterinarian to input patient data, including abdominal ultrasound examination findings. The accuracy of the calculation depends on the accuracy of the information provided.

Veterinarians who seek to use T-STAT may wish to provide owners with an optional informed consent form (pdf).

T-STAT DATA REQUIREMENTS

Ultrasound Parameters:
  • Quantity of abdominal effusion, categorized as either none/mild or moderate/marked
  • Splenic mass inhomogeneity in the most inhomogeneous region of the largest mass observed, categorized as either none/mild or moderate/marked
  • Number of liver nodules, categorized as none, one or greater than one
  • Splenic mass diameter in cm, rounded to the nearest whole cm
  • Number of splenic masses or nodules, categorized as one or greater than one
  • Mesenteric, omental or peritoneal nodules (present or absent)
Patient & Laboratory Parameters:
  • Serum total protein rounded to the nearest whole integer.
  • Nucleated red blood cells per 100 white blood cells (nRBCs/100 WBCs), categorized as either 0 or 1 nRBC/100 WBC or 2 or more nRBCs/100 WBCs

The publication that describes the process used to derive the model is [pdf] PMID: 34061606.