DermatomyositisDownloads

A 10-year-old boy presents with fever, joint pain, and a lesion over his hand, as seen in the image below. Which of the following is the clinical finding, and what is the likely diagnosis?

A 50-year-old male patient presented with weakness of bilateral lower limbs which was symmetrical (distal weakness >> proximal muscle weakness) for 1 month. On examination, certain skin and nail changes were noted. Patient also complained of myalgia and arthralgia. Lab findings: Raised creatinine kinase levels, Raised ANA antibody titre. Muscle biopsy was done from the quadriceps femoris muscle. CD4+ cells were found in the cellular infiltrate. IHC study of which protein is a very sensitive diagnostic test for the above condition?