Clinical spectrum time course in non-Asian patients positive for anti-MDA5 antibodies.

OBJECTIVES: To define the clinical spectrum time-course and prognosis of non-Asian patients positive for anti-MDA5 antibodies. METHODS: We conducted a multicentre, international, retrospective cohort study. RESULTS: 149 anti-MDA5 positive patients (median onset age 53 years, median disease duration 18 months), mainly females (100, 67%), were included. Dermatomyositis (64, 43%) and amyopathic dermatomyositis (47, 31%), were the main diagnosis; 15 patients (10%) were classified as interstitial pneumonia with autoimmune features (IPAF) and 7 (5%) as rheumatoid arthritis. The main clinical findings observed were myositis (84, 56%), interstitial lung disease (ILD) (108, 78%), skin lesions (111, 74%), and arthritis (76, 51%). The onset of these manifestations was not concomitant in 74 cases (50%). Of note, 32 (21.5%) patients were admitted to the intensive care unit for rapidly progressive-ILD, which occurred in median 2 months from lung involvement detection, in the majority of cases (28, 19%) despite previous immunosuppressive treatment. One-third of patients (47, 32% each) was ANA and anti-ENA antibodies negative and a similar percentage was anti-Ro52 kDa antibodies positive. Non-specific interstitial pneumonia (65, 60%), organising pneumonia (23, 21%), and usual interstitial pneumonia-like pattern (14, 13%) were the main ILD patterns observed. Twenty-six patients died (17%), 19 (13%) had a rapidly progressive-ILD. CONCLUSIONS: The clinical spectrum of the anti-MDA5 antibodies-related disease is heterogeneous. Rapidly-progressive ILD deeply impacts the prognosis also in non-Asian patients, occurring early during the disease course. Anti-MDA5 antibody positivity should be considered even when baseline autoimmune screening is negative, anti-Ro52 kDa antibodies are positive, and radiology findings show a NSIP pattern.

IgA vasculitis as a presentation of human immunodeficiency virus infection. / Vasculitis IgA como forma de presentación de la infección por el virus de inmunodeficiencia humana.

IgA vasculitis is a small-vessel vasculitis mediated by immune complexes. In clinical terms, it is characterized by palpable purpura in the lower limbs, joint involvement in the form of arthralgia or arthritis, and gastrointestinal and renal involvement (this will mark a poorer prognosis in adults). Infectious processes, mainly in the upper respiratory tract, are frequently found to be triggers. On the other hand, human immunodeficiency virus (HIV) causes immune dysfunction, which triggers hypergammaglobulinemia and can trigger autoimmune disorders. At times, this can affect the vascular endothelium, giving rise to vasculitic manifestations, although there are few reports in the literature of its role in the presentation of HIV.

Sarcoidosis-lymphoma syndrome. / Síndrome sarcoidosis-linfoma.

A 65 year-old female with a history of sarcoidosis with pulmonary and joint involvement, who after 5 years of diagnosis begins with central nervous system involvement manifesting as diplopia. She presents normal analysis results. In imaging results, a mass is identified in the right intraconal space; it depends of right optic nerve, and shows multiple lymph node involvement. Biopsy was performed diagnosed with large B-cell lymphoma, an atypical form of tumor associated with sarcoidosis.

Artritis séptica como forma de inicio de una piomiositis / Pyomyositis presenting as septic arthritis

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Hemartrosis por escorbuto / Hemarthrosis and scurvy

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Varicela por virus vacunal en un paciente en tratamiento con metotrexato / Post-vaccination varicella in a patient receiving methotrexate

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Síndrome sarcoidosis-linfoma / Sarcoidosis-lymphoma syndrome

Mujer de 65 años de edad con antecedentes de sarcoidosis, con afectación pulmonar y articular, que tras 5 años del diagnóstico comienza con afectación del sistema nervioso central, manifestándose como diplopía. Presenta analíticas normales. En las pruebas de imagen se identifica masa intraconal derecha dependiente del nervio óptico derecho, así como múltiple afectación adenopática. Se realizó biopsia con diagnóstico de linfoma B de células grandes, forma atípica de tumor asociado a sarcoidosis (AU)

A 65 year-old female with a history of sarcoidosis with pulmonary and joint involvement, who after 5 years of diagnosis begins with central nervous system involvement manifesting as diplopia. She presents normal analysis results. In imaging results, a mass is identified in the right intraconal space; it depends of right optic nerve, and shows multiple lymph node involvement. Biopsy was performed diagnosed with large B-cell lymphoma, an atypical form of tumor associated with sarcoidosis (AU)

Vasculitis IgA como forma de presentación de la infección por el virus de inmunodeficiencia humana / IgA vasculitis as a presentation of human immunodeficiency virus infection

La vasculitis IgA es una vasculitis de pequeño vaso mediada por inmunocomplejos. Clínicamente se caracteriza por la púrpura palpable en miembros inferiores, la afectación articular en forma de artralgias o artritis y la afectación gastrointestinal y renal (esta última marcará el mal pronóstico en adultos). Es frecuente encontrar procesos infecciosos como desencadenantes, principalmente de vías respiratorias altas. Por otro lado, el VIH causa una disfunción inmunitaria que desencadena una hipergammaglobulinemia y puede desencadenar alteraciones autoinmunes. En ocasiones este efecto se realiza sobre el endotelio vascular dando lugar a cuadros vasculíticos, aunque como forma de inicio los casos descritos en la literatura son escasos

IgA vasculitis is a small-vessel vasculitis mediated by immune complexes. In clinical terms, it is characterized by palpable purpura in the lower limbs, joint involvement in the form of arthralgia or arthritis, and gastrointestinal and renal involvement (this will mark a poorer prognosis in adults). Infectious processes, mainly in the upper respiratory tract, are frequently found to be triggers. On the other hand, human immunodeficiency virus (HIV) causes immune dysfunction, which triggers hypergammaglobulinemia and can trigger autoimmune disorders. At times, this can affect the vascular endothelium, giving rise to vasculitic manifestations, although there are few reports in the literature of its role in the presentation of HIV

Vasculitis del sábado noche / Saturday night vasculitis

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