The "gourd spleen". A positional effect.
D000368:Aged; D005260:Female; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011187:Posture; D011877:Radionuclide Imaging; D013154:Spleen / Q000000981:diagnostic imaging*