What condition is indicated by the inability to touch the left scapula with the right hand?

The inability to touch the left scapula with the right hand suggests a limitation in shoulder mobility and strength, which is consistent with a rotator cuff tear. The rotator cuff is a group of muscles and tendons that stabilize the shoulder and enable a full range of motion.

When a tear occurs, it can cause significant pain and limit the range of motion, making simple movements, such as reaching behind the back to touch the scapula, very difficult or impossible. Individuals may experience weakness and instability in the shoulder, further contributing to the inability to perform such movements.

In contrast, conditions like shoulder dislocation primarily involve acute trauma and position change, while a bicep tendon rupture would typically present with different symptoms, such as noticeable deformity or a "Popeye" appearance in the arm. Frozen shoulder, or adhesive capsulitis, does lead to restricted movement but usually presents with pain and stiffness that gradually worsens, rather than a specific inability linked to the use of one arm to reach another. Therefore, the characteristics of a rotator cuff tear align well with the scenario outlined in the question.