Is juvenile dermatomyositis a different disease in children up to three years of age at onset than in children above three years at onset? A retrospective review of 23 years of a single center’s experience

Table 8 Histochemical findings of biopsy tissue of patients who did not have classic JDM rash (heliotrope, nail bed capillary changes and Gorton papules)

Patient number	Deposition of MAC (membrane attack complex)	Perivascular and perifascicular inflammatory Infiltration (The predominantly B cells & CD4+ T cells)	Perifascicular necrosis/ atrophy	Vasculopathic changes in capillaries/reduced capillary number	Myocyte necrosis and regeneration	Special comments
DM1	+	+	+	+	+
DM2	_	+	+	+	+	Received oral steroids for a month before biopsy
DM3	+	+	+	+	+
DM4	+	+	+	+	+
DM5	+	+	+	+	+
DM6	-	+	+	+	+	Received two IV pulse steroids before biopsy

ISSN: 1546-0096