Benjamin Chaigne, Mickael Martin, Bénédicte Watelet, Elisabeth Diot, Claire Le Jeunne, François Maurier, Jérémie Dion, Luc Mouthon, Cloé Giret, Jean François Viallard, Sabine Berthier, Pascal Priollet, Marie-Elise Truchetet, Alain Lescoat, Olivier Cerles, Dorothée Fagedet, Cyril Cosse, Loic Raffray, Brigitte Granel, Christelle Nguyen, J. Bertolino, Ségolène Toquet, Solen Kernéis, David Luque Paz, Wendy Jourde, Christian Agard, and Grégory Pugnet
Systemic sclerosis (SSc) is an autoimmune connective tissue disorder characterized by skin fibrosis, vasculopathy, and dysimmunity. Data regarding osteitis in SSc are scarce.We performed a nationwide multicenter, retrospective, case-control study including patients with SSc, according to the 2013 American College of Rheumatology/European Alliance of Associations for Rheumatology classification, with a diagnosis of osteitis. The objectives of the study were to describe, to characterize, and to identify associated factors for osteitis in patients with SSc.Forty-eight patients were included. Twenty-six patients (54.1%) had osteitis beneath digital tip ulcers. Physical symptoms included pain (36 of 48, 75%), erythema (35 of 48, 73%), and local warmth (35 of 48, 73%). Thirty-one (65%) patients had median (interquartile range) C-reactive protein levels2 mg/liter of 8 (2.7-44.3) mg/liter. On radiography, computed tomography, or magnetic resonance imaging, osteitis was characterized by swelling or abscess of soft tissues, with acro-osteolysis or lysis in 28 patients (58%). Microbiological sampling was performed in 45 (94%) patients. Most pathogens were Staphylococcus aureus (43.8%), anaerobes and Enterobacteriaceae (29.1%), and Pseudomonas aeruginosa (10.4%). Management comprised antibiotics in 37 (77.1%) patients and/or surgery in 26 (54.2%). Fluoroquinolones were used in 22 (45.8%) patients, and amoxicillin plus β-lactamase inhibitor in 7 (14.6%). Six (12.6%) patients relapsed, 6 (12.6%) patients had osteitis recurrence, 15 (32%) sequelae, and 2 patients had septic shock and died.This study confirmed digital tip ulcers as an associated factor for osteitis and revealed a high rate of functional sequelae. Antimicrobial therapy with oral fluoroquinolone or intravenous amoxicillin and β-lactamase inhibitor are used as first-line antibiotic therapy in SSc patients with osteitis.