Final answer:
A positive Kleiger's test is indicative of ligament injury or instability and causes pain in the stressed area during external rotation. It should not be confused with lab test results that involve visual signs like dark clumps against a background.
Step-by-step explanation:
A positive Kleiger's test (external rotation test) in the medical field is indicative of an injury or instability, such as a high ankle sprain or deltoid ligament tear. When the test is positive, the patient will typically experience pain in the affected area, which is the result of putting stress on injured ligaments during the external rotation of the foot. A positive test result may not necessarily involve the formation of dark clumps against a blue-green background, which could be related to a microbiology or lab test, rather than the Kleiger's test used in orthopedic assessments.