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The AFAST‐focused spleen should be performed after every AFAST if the spleen is imaged at the HRU (SRU) view (Figure 6.35). The author has routinely adopted this practice since the recognition of medically treated anaphylaxis‐induced hemoabdomen in dogs (Lisciandro 2016a,b; Caldwell et al. 2018; Hnatusko et al. 2019; Birkbeck et al. 2019). The approach is that a positive AFAST‐focused spleen for a mass is likely highly specific (the mass is real). In contrast, a negative AFAST‐focused spleen doesn't rule a mass out (dependent on the operator). The AFAST‐focused spleen is a screening test. For more detail, see Chapter 9.

 The spleen is identified by the finding of a hyperechoic capsule and the blood supply splitting the capsule.

 The slide and fan technique is repeated through successive sections while overlapping between sections. A more detailed evaluation may be found in Chapter 9.

 Scan cranially and then caudally to each end of the spleen. The author performs this twice and makes sure that the spleen was maximally imaged at the SR view.

 A mass that deforms the capsule of the spleen is always considered a serious finding.