Resumo

RUSINOVICH, Olga; MORAN, Luz María; NAJERA BOTELLO, Laura  e  ANDREU, José Luis. Benign rheumatoid nodule in the soleus muscle. Case report. Rev.Colomb.Reumatol. [online]. 2021, vol.28, n.2, pp.152-155.  Epub 13-Jan-2022. ISSN 0121-8123.  https://doi.org/10.1016/j.rcreu.2020.05.002.

Benign rheumatoid nodules are subcutaneous nodules, identical in morphology and histo logy to those that occur in the course of rheumatoid arthritis. They appear in people without symptoms of arthritis and with negative rheumatoid factor.

The case is presented of a 46-year-old Caucasian man who consulted for a tumour inthe right leg. He was negative for rheumatoid factor, anti-citrullinated protein antibodies, antinuclear antibodies, and antineutrophil cytoplasmic antibodies, as well as for acute phase reactants. A musculoskeletal ultrasound showed a solid tumour of 3.5 × 1.5 cm with well-defined margins in the soleus muscle, and with a heterogeneous hypoechoic structure with intra- and peri-lesional vascularisation. The magnetic resonance imaging showed a fibrous tumour with no signs suggestive of aggressive growth. An ultrasound-guided biopsy sho wed the characteristic histology of the rheumatoid nodule. The clinical picture, diagnosis, differential diagnosis, and treatment of benign rheumatoid nodules are discussed.

Palavras-chave : Rheumatoid nodule; Benign rheumatoid nodule; Differential diagnosis of rheumatoid nodule; Clinical manifestations of rheumatoid nodule; Treatment of rheumatoid nodule.

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