Diagnosis: Cutaneous sarcoidosis
A 35-year-old female presents with a 6-month history of violaceous annular plaques on the nose and cheeks. The lesions are asymptomatic but have been progressively enlarging, leading to cosmetic concerns. This case highlights the clinical features and management of a condition characterized by non-caseating granulomas.
A 35-year-old female presents with a 6-month history of violaceous annular plaques located on the nose and cheeks. The patient reports that the lesions are asymptomatic but have gradually increased in size, causing cosmetic distress. On physical examination, the plaques are well-defined, erythematous to violaceous, and exhibit a slight scaling.Location: Primarily on the face, particularly the nose and cheeks.Appearance: Well-defined, violaceous annular plaques with a slightly scaly surface.Size: Lesions range from 1 to 3 cm in diameter.Symptomatology: Asymptomatic, with no reported pruritus or pain.Associated findings: No systemic symptoms such as fever or weight loss noted.
The patient first noticed the lesions approximately 6 months ago without any preceding trauma or infection. She has a history of asthma but no known autoimmune diseases in her family. The patient has not tried any treatments for the skin lesions, and there are no significant social history factors such as smoking or exposure to known triggers.Onset: Lesions appeared gradually over 6 months.Triggers: No identifiable triggers; no recent infections or travel history.Past medical history: Asthma, well-controlled, no history of skin disorders.Family history: No family history of sarcoidosis or other granulomatous diseases.Social history: Non-smoker, no significant occupational exposures.
Acute / First-Line ManagementTopical corticosteroids: High-potency topical steroids (e.g., clobetasol propionate 0.05% ointment) applied twice daily may be effective for localized lesions.Intralesional corticosteroids: Triamcinolone acetonide (10-40 mg/mL) can be injected directly into thicker lesions for rapid response.Systemic corticosteroids: For extensive disease, prednisone at 0.5-1 mg/kg/day may be initiated, followed by a tapering schedule based on clinical response.Workup and Diagnostic ConfirmationSkin biopsy: A punch biopsy should be performed to confirm the diagnosis, showing non-caseating granulomas.Chest imaging: Chest X-ray or CT scan to evaluate for pulmonary involvement, which may accompany cutaneous manifestations.Serologic studies: Consider serum angiotensin-converting enzyme (ACE) levels, although not diagnostic, they may support the clinical suspicion.Long-Term ManagementMonitoring: Regular follow-up to assess for new lesions or systemic involvement.Immunosuppressive therapy: In cases resistant to corticosteroids, consider methotrexate or azathioprine.Patient education: Discuss the chronic nature of the disease and potential for resolution or recurrence.
Granuloma annulare: Characterized by annular plaques and typically resolves spontaneously; lacks systemic symptoms or granulomas on biopsy.Discoid lupus erythematosus: Presents with well-defined, erythematous plaques, but often associated with scarring and hair loss; positive ANA and skin biopsy shows interface dermatitis.Psoriasis: Scaly plaques with well-defined borders, often located on extensor surfaces; may be associated with nail changes and has a different histopathological appearance.Necrobiosis lipoidica: Presents with yellow-brown plaques, commonly on the shins; associated with diabetes and shows a different histological pattern.Chronic cutaneous lupus erythematosus: Can present with similar lesions but typically has associated systemic features and positive autoantibodies.Cutaneous T-cell lymphoma: May present with plaques but typically shows atypical lymphocytes on histology and may have systemic involvement.Skin cancer: Squamous cell carcinoma or basal cell carcinoma may appear as plaques but would exhibit atypical features on examination.
High-Yield PearlsGranulomatous inflammation: Recognize that cutaneous sarcoidosis is characterized by non-caseating granulomas on biopsy.Topical therapy: High-potency topical corticosteroids are often sufficient for localized cutaneous lesions.Systemic involvement: Always assess for pulmonary or other organ involvement in patients with cutaneous manifestations.Chronicity: Cutaneous sarcoidosis can be persistent; long-term management and monitoring are essential.Histological confirmation: A skin biopsy is critical for diagnosis, as clinical features can mimic several other dermatoses.Cutaneous sarcoidosis can present with subtle lesions that require a high index of suspicion for diagnosis and management.
Tags: sarcoidosis, granulomatous