Expanding the spectrum of the hyperferritinemic syndrome, from pathogenic mechanisms to clinical observations, and therapeutic implications.

From the introduction of hyperferritinemic syndrome concept, a growing body of evidence has suggested the role of ferritin as a pathogenic mediator and a relevant clinical feature in the management of patients with inflammatory diseases. From a pathogenic point of view, ferritin may directly stimulate the aberrant immune response by triggering the production of pro-inflammatory mediators in inducing a vicious pathogenic loop and contributing to the occurrence of cytokine storm syndrome. The latter has been recently defined as a clinical picture characterised by elevated circulating cytokine levels, acute systemic inflammatory symptoms, and secondary organ dysfunction beyond that which could be attributed to a normal response to a pathogen It is noteworthy that the occurrence of hyperferritinemia may be correlated with the development of the cytokine storm syndrome in the context of an inflammatory disease. In addition to adult onset Still's disease, macrophage activation syndrome, catastrophic anti-phospholipids syndrome, and septic shock, recent evidence has suggested this association between ferritin and life-threatening evolution in patients with systemic lupus erythematosus, with anti-MDA5 antibodies in the context of poly-dermatomyositis, with severe COVID-19, and with multisystem inflammatory syndrome. The possible underlying common inflammatory mechanisms, associated with hyperferritinemia, may led to the similar clinical picture observed in these patients. Furthermore, similar therapeutic strategies could be suggested inhibiting pro-inflammatory cytokines and improving long-term outcomes in these disorders. Thus, it could be possible to expand the spectrum of the hyperferritinemic syndrome to those diseases burdened by a dreadful clinical picture correlated with hyperferritinemia and the occurrence of the cytokine storm syndrome. In addition, the assessment of ferritin may provide useful information to the physicians in clinical practice to manage these patients. Therefore, ferritin may be considered a relevant clinical feature to be used as biomarker in dissecting the unmet needs in the management of these disorders. Novel evidence may thus support an expansion of the spectrum of the hyperferritinemic syndrome to these diseases burdened by a life-threatening clinical picture correlated with hyperferritinemia and the occurrence of the cytokine storm syndrome.

Antisynthetase Syndrome: two case report and literature review.

Antissintetase Syndrome (ASS) is characterized by myositis, Raunaud's phenomenon, fever, intertitial lung disease, mechanic's hands and arthropathy associated with the presence of antibodies against tRNA synthetase, especially anti-Jo-1. This article aims to review the literature on ASS and report two cases where the first is a patient with polymyositis who developed subluxation on the proximal interphalangeal joint of bilateral first right finger after a few years of the disease, associated with pulmonary manifestations and positive anti-JO-1. In the second case, we present a patient with dermatomyositis, who developed a subluxation of the two first fingers, anti-Jo1 positive and chest CT changes, but without clinical evidence of pulmonary involvement. These cases reveal the importance of performing early diagnosis. The authors describe two cases of this rare syndrome, emphasizing the severity of interstitial lung disease and arthritis.

Síndrome Antissintetase: relato de dois casos e revisão da literatura / Antisynthetase Syndrome: two case reports and literature review

A Síndrome Antissintetase (SAS) é caracterizada por miosite, fenômeno de Raynaud, febre, doença pulmonar intersticial, artropatia e mãos de mecânico associados à presença de anticorpos contra a sintetase do RNAt especialmente anti-Jo-1. Este artigo tem como objetivo revisar a literatura sobre SAS e relatar dois casos, sendo o caso 1 de uma paciente com Polimiosite que desenvolveu, após alguns anos de doença, subluxação da articulação interfalangeana proximal do primeiro quirododáctilo direito, associada a manifestações pulmonares e anti-Jo-1 positivo. O caso 2 é de uma paciente com Dermatomiosite que evoluiu com subluxação dos dois primeiros quirodáctilos, anti-Jo-1 positivo e alterações pulmonares intersticiais na TC de tórax, porém assintomática. Esses casos demonstram a importância do diagnóstico precoce. Os autores descrevem dois casos dessa síndrome rara, enfatizando a sua gravidade do ponto de vista pulmonar e articular.

Antisynthetase Syndrome (ASS) is characterized by myositis, Raynaud's phenomenon, fever, interstitial lung disease, mechanic's hands and arthropathy associated with the presence of antibodies against tRNA synthetase, especially anti-Jo-1. This article aims to review the literature on ASS and report two cases where the first is a patient with polymyositis who developed subluxation on the proximal interphalangeal joint of bilateral first right finger after a few years of the disease, associated with pulmonary manifestations and positive anti-JO-1. In the second case, we present a patient with dermatomyositis, who developed a subluxation of the two first fingers, anti-Jo1 positive and chest CT changes, but without clinical evidence of pulmonary involvement. These cases reveal the importance of performing early diagnosis. The authors describe two cases of this rare syndrome, emphasizing the severity of interstitial lung disease and arthritis.