Final answer:
The AP Projection-External Rotation is contraindicated in the case of suspected shoulder fractures or dislocations due to the possibility of exacerbating the injury.
Step-by-step explanation:
The question pertains to the appropriateness of certain shoulder radiographic projections when a fracture or dislocation of the shoulder is suspected. When dealing with a suspected shoulder fracture or dislocation, care must be taken to avoid movements that can exacerbate the injury. AP Projection-External Rotation is generally contraindicated in cases of suspected fractures or dislocations because moving the arm into external rotation can cause further harm. The remaining projections, AP Projection-Internal Rotation and Inferiosuperior Axial Projection-Lawrence Method, might still be applicable but must be conducted under medical supervision with caution depending on the specific clinical scenario and patient stability.