inear nonblanching skin lesions sometimes develop in apparently healthy skin following mechanical friction. This tendency, often termed Köbnerization, is common in psoriasis, lichen planus, vitiligo, and many bullous dermatoses. 1 Very rarely, such lesions have also been documented in patients with Henoch-Schönlein syndrome, an immunoglobulin A-dominant leukocytoclastic small vessel vasculitis. [2][3][4][5][6][7][8] This report presents our prospective experience with linear nonblanching skin lesions in children with this vasculitis syndrome.
MethodsTen years ago, one of us (M.G.B.) observed, for the first time, horizontal lesions on the waistline of a boy with Henoch-Schönlein syndrome. 3 Between January 1, 2010, and Decem-ber 31, 2015, all children with Henoch-Schönlein syndrome who presented to this pediatric hospitalist underwent a structured skin examination in addition to the usual clinical and laboratory evaluation (complete blood cell count, C-reactive protein, and urinalysis). Significant emphasis was put on the presence of nonblanching, palpable lesions with a linear pattern and a length of at least 3 cm (subsequently referred to as linear lesions) on the legs, groin, waistline, wrists, or forearms. The possible association of linear lesions with mechanical frictions was also addressed.The diagnosis of Henoch-Schönlein syndrome required the fulfillment of the Ankara 2008-EULAR/PRINTO/PRES (European League Against Rheumatism/Paediatric Rheumatology International Trials Organisation/Paediatric Rheumatology European Society) criteria. The cutaneous, abdominal, articular, and renal involvement was graded on a scale from 0 to 3, where 0 indicates absent, 1 indicates mild, 2 indicates mod-IMPORTANCE Linear nonblanching skin lesions are thought to occur very rarely in patients with Henoch-Schönlein syndrome.OBJECTIVE To examine the prevalence and characteristics of linear nonblanching skin lesions in children with Henoch-Schönlein syndrome.