ALERT These are the signs that it is cre…See more

 

These are the signs that it is cre…

When a COPD Inhaler Triggers a Rare Skin Disorder: A Case of Sweet Syndrome

What began as a routine adjustment in a patient’s COPD treatment quickly evolved into a puzzling and rare medical case.

Within just 48 hours of switching inhalers, a 55-year-old woman developed intensely painful, bright red patches across her face and neck, accompanied by a mild fever. Although the visible symptoms subsided rapidly, further investigation revealed a surprising diagnosis: Sweet syndrome, a rare immune-mediated skin condition.

A Routine Change with Unexpected Consequences

The patient had a stable medical history, including hypertension and chronic obstructive pulmonary disease (COPD). She had been managing her condition effectively for years with enalapril and a formoterol inhaler.

However, due to declining lung function, her pulmonologist transitioned her to a new inhaler combining indacaterol and glycopyrronium.

Just two days after starting the new medication, she presented with:

• Painful, erythematous (red) plaques on the face and neck
• Low-grade fever

She reported no recent changes in cosmetics, diet, or illnesses, though she had experienced sun exposure with appropriate protection.

Diagnosis: Sweet Syndrome

The patient was urgently referred to dermatology and advised to discontinue the new inhaler.

Further testing revealed:

• No signs of infection
• Negative autoimmune markers
• Skin biopsy confirming Sweet syndrome

Treatment with oral corticosteroids led to rapid improvement, with symptoms resolving within 48 hours.

Understanding Sweet Syndrome

Also known as acute febrile neutrophilic dermatosis, Sweet syndrome is characterized by:

• Sudden onset of painful red papules or plaques
• Common involvement of the face, neck, upper torso, and hands
• Systemic symptoms such as fever and elevated white blood cell counts

The condition is believed to result from an abnormal immune response driven by cytokines.

Known Triggers Include:

• Infections
• Malignancies
• Certain medications (e.g., antibiotics, antiepileptics, vaccines)

Corticosteroids are typically highly effective, often producing rapid symptom relief.

Why This Case Is Unique

What makes this case particularly noteworthy is the suspected trigger: an inhaled medication.

To date, inhaled therapies have not been previously documented as a cause of Sweet syndrome. Other potential diagnoses—including contact dermatitis, lupus, and urticaria—were carefully ruled out.

Clinical Implications

Sweet syndrome is rare and can be easily overlooked, especially in its early stages. It is also sometimes associated with serious underlying conditions, making accurate and timely diagnosis critical.

This case underscores:

• The importance of monitoring for adverse reactions after medication changes
• The need for clinicians to consider rare diagnoses when symptoms evolve rapidly
• The vital role of primary care providers in recognizing unusual presentations and initiating prompt referrals

Key Takeaway

Even commonly prescribed treatments, such as inhalers, can occasionally trigger unexpected and serious immune responses.

For healthcare professionals, maintaining vigilance when patients present with sudden skin changes following medication adjustments can lead to faster diagnosis and more effective treatment—ultimately improving patient outcomes.