Two cases of prurigo pigmentosa in atopic patients

Prurigo pigmentosa: a clinicopathological study and analysis of associated factors

“…chrome and chromium), drug use (bismuth subsalicylatecontaining antacid), Helicobactor pylori infection, primary biliary cirrhosis with Sjögren's syndrome, atopic disease, ketosis as a consequence of diabetes mellitus, and anorexia nervosa or dieting 1,[15][16][17][18][19][20][21][22][23]. In our study, newly associated underlying diseases (hepatitis B and tuberculo-sis cervical lymphadenitis) may be coincidental or have uncertain roles in the pathogenesis of PP.…”

Prurigo pigmentosa

“…The etiology and pathogenesis of prurigo pigmentosa are still unknown. In the literature, possible associations with atopic dermatitis [2], stress, anorexia nervosa and nutritional disturbances as well as diabetes mellitus [3] and ketoacidosis have frequently been discussed. Lu et al suspected an association with herpes viruses [4] due to the histological similarities with erythema multiforme.…”

Prurigo pigmentosa in a patient with nickel sensitivity

“…Prurigo pigmentosa (PP), first described by Nagashima in 1971, is a rare inflammatory dermatitis characterized by recurrent, pruritic erythematous papules coalescing to form a reticulated pattern and distributed symmetrically on the back, neck and chest 1 . Although PP's aetiology remains unknown, it has been reported that some contact allergens such as trichlorophenol 2 and chromium 3 , have been associated with PP. We want to present a case of PP in a patient with nickel sensitivity.…”

“…Some exogenous factors, including sweating, friction from clothing, 2 bismuth subsalisilate ingestion 4 and contact allergens such as para ‐amino compounds, trichlorophenol 2 and chromium 3 are thought to play a role in the aetiology of this dermatitis. Our patient had a history of contact dermatitis with metal jewelry, and the European standard patch test was positive for nickel.…”

“…Although it has been reported that some conditions, such as ketonemia resulting from diabetes mellitus, dieting 2 or pregnancy; 2,5 anorexia nervosa; 6 Helicobacter pylori infection 7 and atopic diathesis, 2 have been associated with PP, it also has been claimed that no correlation between endogenous or exogenous factors and PP has been documented 8 …”