| PSA | parasternal short axis; pleomorphic salivary gland adenoma; polyethylene sulfonic acid; polysacchari... |
|---|---|
| SAD | Scale of Anxiety and Depression; seasonal affective disorder; Self-Assessment Depression [scale]; se... |
| SAX | short axis; surface antigen, X-linked |
| SAx | short axis |
| SAX-APEX | short-axis plane, apical |