Diagnosis: Acute cutaneous lupus erythematosus (malar rash)
A 28-year-old female presents with a 2-week history of a facial rash, primarily affecting the cheeks and forehead, with notable sparing of the nasolabial folds. Examination reveals a well-defined erythematous rash consistent with a classic presentation of malar erythema, raising suspicion for an autoimmune etiology, particularly in the context of systemic symptoms.
The patient is a 28-year-old female who presents with a 2-week history of a facial rash that has progressively worsened. She reports associated fatigue and mild arthralgia. On examination, a well-defined, erythematous rash is observed on the cheeks and forehead, with notable sparing of the nasolabial folds.Well-defined erythematous rash: Located on the cheeks and forehead.Sparing of nasolabial folds: A classic feature distinguishing this rash.Associated symptoms: Fatigue and arthralgia suggest systemic involvement.Absence of scaling: Lesions are non-scaling, further supporting the diagnosis.No prior history: Patient denies previous skin conditions or similar rashes.
The onset of the rash occurred approximately two weeks prior to presentation, with no identifiable triggers. The patient reports intermittent photosensitivity and has a past medical history significant for mild allergic rhinitis. Family history is notable for lupus in a maternal aunt. Social history reveals occasional sun exposure, and the patient denies smoking or alcohol use. No prior treatments have been attempted for this rash.Onset: Rash began two weeks ago without clear precipitating factors.Systemic symptoms: Reports fatigue and joint pain.Family history: Maternal aunt diagnosed with systemic lupus erythematosus.Photosensitivity: Intermittent sensitivity to sunlight noted.No previous treatments: No topical or systemic therapies have been attempted.
Acute / First-Line ManagementSun protection: Daily use of broad-spectrum sunscreen (SPF 30 or higher).Topical corticosteroids: Class II to IV steroids (e.g., fluocinonide 0.05% cream) applied twice daily until improvement.Hydroxychloroquine: Initiate at 200-400 mg daily for systemic symptom management.Workup and Diagnostic ConfirmationLaboratory tests: Complete blood count, comprehensive metabolic panel, and urinalysis to assess for systemic involvement.Autoantibody testing: Antinuclear antibody (ANA) and anti-double-stranded DNA (anti-dsDNA) antibodies to support diagnosis.Skin biopsy: Consider if the diagnosis remains uncertain; histopathology may show interface dermatitis.Long-Term ManagementRegular follow-up: Monitor for disease progression and therapy response.Immunosuppressive therapy: Consider if systemic involvement is significant; options include mycophenolate mofetil or azathioprine.Patient education: Emphasize the importance of sun protection and awareness of systemic symptoms.
Rosacea: Typically presents with facial erythema and telangiectasia but lacks the characteristic sparing of nasolabial folds.Dermatomyositis: Characterized by heliotrope rash and Gottron's papules; systemic muscle involvement is often present.Seborrheic dermatitis: Presents with scaly plaques; often involves nasolabial folds, which distinguishes it from this case.Contact dermatitis: Usually presents with pruritus and may have a history of exposure to allergens; often lacks systemic symptoms.Psoriasis: Typically presents with well-defined erythematous plaques with silvery scales; does not spare the nasolabial folds.Systemic sclerosis: Characterized by skin thickening and systemic features, but facial involvement is different than seen here.Infectious rash (e.g., viral exanthema): May present with facial involvement but usually has accompanying systemic signs of infection.Fixed drug eruption: Usually localized and associated with specific drug exposure; resolves upon discontinuation of the offending agent.
High-Yield PearlsMalar rash: Classic presentation of acute cutaneous lupus erythematosus, characterized by its butterfly distribution.Photosensitivity: Common symptom in lupus; patients often report exacerbation of rashes with sun exposure.Systemic involvement: Fatigue and arthralgia can indicate potential systemic lupus erythematosus; thorough evaluation is necessary.Diagnosis confirmation: Positive ANA and anti-dsDNA are supportive but not definitive; clinical correlation is critical.Sun protection: Essential in managing lupus patients to prevent flare-ups; daily sunscreen should be emphasized.Recognizing the characteristic malar rash is crucial in the early diagnosis of lupus, aiding in timely management and improved patient outcomes.
Tags: ACLE, lupus, malar