Final answer:
Bat wing vessels or Kerley B lines on a CXR should make you think of pulmonary edema as a possible diagnosis.
Step-by-step explanation:
Bat wing vessels or Kerley B lines on a CXR (chest X-ray) should make you think of pulmonary edema as a possible diagnosis. Pulmonary edema is a condition where there is an accumulation of fluid in the lungs, leading to the appearance of these abnormal blood vessels called bat wing vessels or the presence of Kerley B lines. These findings are often seen in conditions such as congestive heart failure or acute respiratory distress syndrome (ARDS).