Ann Dermatol.  2023 Nov;35(Suppl2):S272-S274. 10.5021/ad.21.312.

Methotrexate-Induced Accelerated Nodulosis in a Patient with Systemic Lupus Erythematosus

• Kwon HM
• Jeong EH
• Yim JE
• Kim HR
• Shin DH
• Choi JS
• Bae YK

• KMID: 2548872
• DOI: http://doi.org/10.5021/ad.21.312

Abstract

Methotrexate (MTX)-induced accelerated nodulosis (MIAN) reportedly occurs in patients with rheumatic arthritis receiving MTX therapy. However, it has also been reported in patients with other autoinflammatory conditions, such as systemic lupus erythematosus (SLE). A 38-year-old woman diagnosed with SLE presented with multiple movable, firm, fleshcolored nodules on both hands that had developed 3 years ago. She was taking oral medications, specifically hydroxychloroquine, azathioprine, and MTX. Histopathological examination revealed palisaded granulomatous inflammation, surrounded by histiocytes and lymphocytes, along the dermis to the subcutaneous fat layer. Fibrinoid degeneration was observed at the center of the granulomatous inflammation, and dermal mucin deposition was not observed. The patient was diagnosed with MIAN, and therefore discontinuation of MTX was recommended. Subsequently, the lesions almost completely disappeared with no signs of recurrence. MIAN exhibits clinicopathological features similar to those of rheumatoid nodules; therefore, it can be easily misdiagnosed. Herein, we report a case of MIAN in a patient with SLE to contribute to the accurate diagnosis and appropriate management.

Keyword

Methotrexate; Rheumatoid nodule