What condition is indicated by a fluid collection migrating with lumbar flexion?

• A. Herniated disc
• B. Morel-Lavallee lesion
• C. Radiculopathy
• D. Lumbosacral strain

Answer: (B)

The Morel-Lavallee lesion is a condition characterized by a post-traumatic seroma, which occurs when there is a separation of the skin from the underlying tissues, often following a shearing injury. In this case, the fluid collection forms in the space created between the skin and the fascia.

When lumbar flexion occurs, the movement can lead to the migration of the fluid due to gravitational effects or changes in pressure within that space. This characteristic movement of the fluid during lumbar flexion is a key indicator of a Morel-Lavallee lesion.

Understanding this specific response helps healthcare professionals recognize and diagnose the condition accurately, which is essential for determining the appropriate management and treatment plan for the patient. The other conditions listed, while they can involve fluid or symptoms in the lumbar region, do not typically present with a fluid collection that migrates with flexion in the same way that a Morel-Lavallee lesion does.