Which condition produces a hyperresonant percussion note?

A. Pneumothorax is correct because a hyperresonant percussion note occurs when air collects in the pleural space, as in a pneumothorax. The presence of excess air increases the resonance of the chest wall, producing a louder, lower-pitched, and more hollow sound when percussed compared with normal, air-filled lungs. Hyperresonance is a classic finding in conditions where there is trapped air, such as tension or simple pneumothorax, and can also be seen in severe emphysema. Detecting hyperresonance during physical examination helps the clinician identify abnormal air accumulation, which may require urgent intervention depending on the severity of the pneumothorax.

B. Lobar pneumonia is incorrect because consolidation from pneumonia involves alveoli filled with inflammatory exudate and fluid, which decreases the air content of the lung. During percussion, these consolidated areas produce a dull percussion note, which is lower in pitch and less resonant compared with normal lung tissue. Hyperresonance does not occur in pneumonia.

C. Pleural effusion is incorrect because fluid in the pleural space dampens the percussion sound, resulting in a dull or flat percussion note. The increased density from the fluid reduces the resonance compared with normal lung, and hyperresonance is not observed.

D. Empyema is incorrect because empyema involves purulent fluid within the pleural space, which similarly produces a dull or flat percussion note. The presence of fluid and thick pus diminishes resonance, so hyperresonance is not expected in this condition.

A. Cluster headaches is incorrect because cluster headaches typically cause severe, unilateral pain, usually around the eye or temporal region, rather than across both sides of the forehead. They are often described as sharp, piercing, or burning, and are commonly associated with autonomic symptoms such as tearing, nasal congestion, eyelid drooping, or facial sweating. The pain occurs in recurrent clusters, often at the same time each day. The patient’s symptoms of bilateral, moderate, non-throbbing pain do not match this pattern.

B. Migraine headaches is incorrect because migraines are usually unilateral and throbbing or pulsating in nature, often described as moderate to severe pain that worsens with activity. Migraines are commonly associated with nausea, vomiting, photophobia, phonophobia, and sometimes aura. The patient’s headache is described as non-throbbing and bilateral, which is inconsistent with typical migraine characteristics.

C. Tension headaches is correct because tension-type headaches are the most common primary headache disorder and are characterized by bilateral, non-throbbing pain that is typically mild to moderate in intensity. Patients often describe the sensation as tightness or pressure across the forehead or around the head, sometimes described as a band-like sensation. These headaches usually lack associated symptoms such as nausea or visual disturbances and often occur with stress, fatigue, or muscle tension. The patient’s description of moderate, non-throbbing pain affecting both sides of the forehead is classic for a tension headache.

D. Secondary headaches is incorrect because secondary headaches occur due to an underlying medical condition, such as infection, trauma, tumors, vascular disorders, or medication effects. The scenario describes a patient with no significant medical history and typical primary headache features, making a primary headache disorder more likely than a secondary cause.