ROSH Geriatrics Practice Test

The presence of weakness of the proximal muscles without pain is a key indicator that supports a diagnosis of polymyositis. This condition primarily affects the skeletal muscles, leading to symmetrical and proximal muscle weakness that can significantly impact daily activities, such as lifting objects, climbing stairs, and reaching overhead. In polymyositis, the weakness typically occurs without the presence of pain, distinguishing it from other conditions that may involve both muscle pain and weakness. This absence of pain helps to identify polymyositis as the underlying cause of the muscle weakness, as painful muscle conditions, such as myofascial pain syndrome or certain inflammatory myopathies, often present with discomfort alongside weakness. Recognizing this unique presentation is crucial in differentiating polymyositis from other muscular disorders. Other options do not align with the classic presentation of polymyositis; for example, the mention of painful proximal muscles without weakness does not support the diagnosis, as polymyositis typically features weakness without significant pain. Positive Homan's sign is related to deep vein thrombosis rather than muscle pathology, and several positive tender points are more aligned with fibromyalgia than with polymyositis. Therefore, the patient’s symptom of proximal muscle weakness without pain is a hallmark feature indicating the likelihood of polymyositis.