Diagnosis: Erythema nodosum (sarcoid-associated, Löfgren syndrome)
A 32-year-old woman presents with painful, erythematous nodules on her shins, accompanied by fever and malaise for two weeks. Imaging reveals hilar lymphadenopathy, leading to the consideration of underlying systemic conditions, particularly sarcoidosis.
A 32-year-old woman presents with a two-week history of painful, erythematous nodules on her pretibial area, along with systemic symptoms of fever and malaise. On examination, she has multiple tender nodules measuring 3-5 cm on both shins, with no signs of ulceration or drainage. There is notable hilar lymphadenopathy on chest imaging.Tender erythematous nodules: Located on the pretibial area, consistent with panniculitis.Systemic symptoms: Patient reports fever, malaise, and arthralgia.Hilar lymphadenopathy: Detected on chest X-ray, suggestive of granulomatous disease.No ulceration or drainage: Nodules are intact, indicating a specific inflammatory process rather than infection.Negative infectious workup: Initial tests for common infections are unremarkable.
The patient reports the sudden onset of symptoms after a recent trip to the southwestern United States, where she experienced respiratory symptoms that resolved spontaneously. She has no significant past medical history and denies any family history of autoimmune diseases. There are no known drug allergies, and she is not on any medications. The patient is a non-smoker and works as a teacher.Recent travel: Patient visited the southwestern United States, a region known for endemic sarcoidosis.Acute onset: Symptoms began abruptly with no prior episodes of similar nodules.No significant past medical history: No previous diagnoses of autoimmune or systemic diseases.Non-smoker: She denies tobacco use, reducing the likelihood of smoking-related conditions.Negative family history: No known hereditary conditions or autoimmune diseases in the family.
Acute / First-Line ManagementNSAIDs: Ibuprofen 600 mg TID for pain management and inflammation reduction.Glucocorticoids: Prednisone 1 mg/kg/day for 2-4 weeks, then tapering based on clinical response.Monitoring: Regular follow-up for symptom resolution and side effects of treatment.Workup and Diagnostic ConfirmationChest imaging: Chest X-ray or CT scan to evaluate for hilar lymphadenopathy.Serum angiotensin-converting enzyme (ACE) levels: Often elevated in sarcoidosis.Biopsy: Consider skin biopsy or lymph node biopsy if diagnosis remains uncertain.Long-Term ManagementFollow-up: Regular monitoring for recurrence or new symptoms.Long-term glucocorticoids: May be necessary for chronic cases, with careful tapering.Consider immunosuppressants: If glucocorticoids are ineffective or if the patient experiences significant side effects.
Granulomatosis with polyangiitis: Presents with nodules and systemic symptoms; consider if renal involvement or respiratory symptoms are present.Infectious panniculitis: Such as bacterial or fungal infections; often associated with systemic symptoms and positive cultures.Behçet's disease: Can cause painful nodules and systemic symptoms; consider if oral ulcers or eye symptoms are present.Sweet's syndrome: Characterized by painful plaques and fever; often associated with malignancy or systemic disease.Chronic venous insufficiency: Can cause lower extremity nodules but lacks systemic symptoms and is typically non-tender.Drug-induced panniculitis: Certain medications can cause similar lesions; detailed medication history is crucial.Other connective tissue diseases: Such as lupus or rheumatoid arthritis; consider if there are joint symptoms or skin findings.
High-Yield PearlsDiagnosis: Erythema nodosum is often associated with systemic diseases, notably sarcoidosis, emphasizing the need for thorough evaluation.Clinical presentation: Classic findings include painful, tender nodules, typically located on the pretibial surfaces.Imaging: Chest X-ray is critical for identifying hilar lymphadenopathy, a key feature in sarcoidosis.Treatment: First-line treatment includes NSAIDs and corticosteroids, with careful monitoring for side effects.Follow-up: Regular follow-up is essential to assess treatment response and detect any recurrence or complications.Understanding the systemic implications of erythema nodosum is crucial for effective management and treatment of underlying conditions.
Tags: erythema nodosum, sarcoidosis, Löfgren