Calcinosis in systemic sclerosis: subsets, distribution and complications.

OBJECTIVE: To retrospectively analyse the features of calcinosis in a cohort of SSc patients. METHODS: Charts of SSc patients attending the Ulcer Unit of the Rheumatology Department, University of Florence and presenting a clinical suspicion of calcinosis were considered in the study. Data on clinical history, including recent skin changes, and clinical examination of all areas with suspected calcinosis, radiological imaging of the calcinotic area, demographics and SSc-related organ involvement and pain measured by a visual analogue scale were recorded. RESULTS: In 52 of 112 SSc patients, a total of 316 calcinoses were recorded and were divided into visible and palpable {154 [47.4%], clustered according to their macroscopic features as mousse [49 (31.8%)] and stone [: 105 (68.2%)]} and non-visible but palpable {: 162 [52.6%]: net [5 (3%)], plate [22 (13.8%)] and stone [135 (83.2%)]}. The X-ray-based classification of all calcinoses, both visible and non-visible, was as follows: stone, 289 (91.4%); net, 12 (3.8%) and plate, 15 (4.8%). Skin ulcers complicated 154 of 316 calcinoses (48.7%). Mousse calcinosis was associated with pulmonary arterial hypertension, the stone subset was suggestive of pulmonary involvement and justified further investigation and the net subset was the slowest to heal. CONCLUSION: Our data indicate that calcinosis may be classified in SSc as mousse, stone, net and plate according to its clinical and X-ray features. This classification awaits validation for a possible use in clinical practice and to support early treatment and prevention of complications.

Autologous mesenchymal stem cells foster revascularization of ischemic limbs in systemic sclerosis: a case report.

BACKGROUND: Mesenchymal stem cells can differentiate into endothelial cells and participate in angiogenesis in adults. In experimental models of acute myocardial infarction, mesenchymal stem cells led to the recovery of cardiac function through the formation of a new vascular network. OBJECTIVE: To describe treatment with intravenous infusions of expanded autologous mesenchymal stem cells in 1 patient with critical limb ischemia due to systemic sclerosis. DESIGN: Case report. SETTING: The rheumatology unit at the University of Florence, Florence, Italy. PATIENT: A woman, aged 34 years, with systemic sclerosis who developed acute gangrene of the upper and lower limbs. INTERVENTION: 3 intravenous pulses of expanded autologous mesenchymal stem cells. MEASUREMENTS: Angiography, skin histopathology, and immunohistochemistry. RESULTS: Areas of necrotic skin were reduced after the first mesenchymal stem-cell infusion. After the third infusion, angiography showed revascularization of the patient's extremities. Skin section analysis revealed cell clusters with tubelike structures, and angiogenic factors were strongly expressed. LIMITATION: Causality cannot be established by a single case. CONCLUSION: In patients with systemic sclerosis who have severe peripheral ischemia, intravenous infusion of expanded autologous mesenchymal stem cells may foster the recovery of the vascular network, restore blood flow, and reduce skin necrosis. PRIMARY FUNDING SOURCE: Fondazione Cassa di Risparmio di Pistoia e Pescia (partial funding).

Digital ulcers in scleroderma: staging, characteristics and sub-setting through observation of 1614 digital lesions.

OBJECTIVE: To evaluate in SSc, the frequency of digital lesions and the morphology, characteristics, natural course and time to healing of 1614 digital ulcers (DUs). METHODS: One hundred SSc patients were followed up for 4 years. In the first step, the digital lesions were observed and classified at the time of presentation [digital pitting scar (DPS); DU; calcinosis; gangrene]. In the second step, DUs were divided into subsets according to their origin and main features. In the third step, the time to healing was recorded for each DU and the influence of DU main characteristics on time to healing was also evaluated. RESULTS: In the first step, 1614 digital lesions were observed: DPS, 712 (44.1%) lesions; DU, 785 (48.6%); calcinosis, 110 (6.8%); and gangrene, 7 (0.8%). In the second step, DUs were subsetted as follows: DU developed on DPS (8.8%), pure DU; DU developed on calcinosis (60%); DU derived from gangrene. In the third step, the mean time to healing was 25.6 (15.6) days in DPS, 76.2 (64) days in pure DU, 93.6 (59.2) days in calcinosis ulcers and 281.1 (263.3) in gangrene. CONCLUSIONS: In SSc, digital lesions are represented by DPS, DU, calcinosis and gangrene, and provide an evidence-based DU subsetting according to their origin and main characteristics. Subsetting may be helpful for a precise DU evaluation and staging, and in randomized controlled trials for a precise identification of those DUs that are to be included in therapeutic studies.