Use of nailfold capillaroscopy for evaluation of disease activity in juvenile dermatomyositis: Results of a two-center retrospective study

Figure 1 Average density and maximal apical dimension analysis by group. A: Analysis of average density by the group; B: Maximal apical dimension analysis by the group. JDM: Juvenile dermatomyositis.

Figure 2 Distribution of patients (%) according to the predominant capillary morphological changes. JDM: Juvenile dermatomyositis.

Figure 3 Dynamics of microvascular changes in a 15-year-old girl with juvenile dermatomyositis before and after therapy. The black line at the top of each image represents 1 mm. Note the increase in capillary density from 2-3/mm to 4-5/mm, the disappearance of microhemorrhages and giant capillaries, and the emergence of a bushy capillary pattern, indicating neovascularization. A: Left hand, second finger before therapy; B: Left hand, second finger after four months of Janus kinase inhibitor therapy; C: Right hand, second finger before therapy; D: Right hand, second finger after 4 months of Janus kinase inhibitor therapy.