This study aimed to investigate the clinical effectivity of intravenous methylprednisolone repeated intermittent pulse combined with mycophenolate mofetil in the treatment of newly diagnosed juvenile dermatomyositis.

Reviewed the clinical data of 12 juvenile dermatomyositis patients, from January 2014 to January 2017, hospitalized and treated with intravenous methylprednisolone repeated intermittent pulse combined with mycophenolate mofetil

Inclusion Criteria:

1. patients with age of JDM onset <16 years
2. newly treated cases
3. no contraindications to corticosteroids
4. provide signed informed consent form
5. regular follow-up for more than 30 months.

Exclusion Criteria:

1. patients with serious complications of heart, liver and kidney
2. patients with a history of contraindications and/or allergies to GC
3. patients who underwent treatment before admission
4. patients who failed to regularly follow-up
5. patients with positive anti-melanoma differentiation-associated gene 5 (MDA5) antibodies

All patients who meet the inclusion and exclusion criteria