Introduction:
Large group of diseases with similar histological pictures. Classified according to the infiltrate distribution, cellular composition of the infiltrate and other signs.
Introduction:
Less common disorder, occuring in two forms: chronic and acute (PLEVA).
Etiology, pathogenesis:
Clinical signs:
Pictures
PLEVA, necrotic papule:
PLEVA, CLINIC (1108)
PLEVA:
PLEVA, CLINIC (1109)
PLEVA:
Pityriasis lichenoides acuta ulcerating, CLINIC (6368)
Pityriasis lichenoides acuta ulcerating, CLINIC (6367)
Pityriasis lichenoides acuta ulcerating, CLINIC (6365)
Pityriasis lichenoides acuta ulcerating, CLINIC (6366)
Histology:
superficial and deep, wedge shaped perivascular infiltrate, vacuolar degeneration of basal layer, hemorrhage, epidermal necrosis.
Pictures
Pityriasis lichenoides acuta:
Pityriasis lichenoides acuta (PLEVA) Mucha Haberman, HE 40x (143)
Pityriasis lichenoides acuta (PLEVA) Mucha Haberman, Goldner 40x (144)
Another case:
PLEVA, HE 60x (6295)
Another case:
Pityriasis lichenoides acuta, early, HE 40x (2125)
Another case:
Pityriasis lichenoides acuta, HE 20x (4948)
And another case:
Pityriasis lichenoides acuta (PLEVA) Mucha Haberman, HE 20x (145)
Another case:
PLEVA, HE 20x (1601)
Another case:
Pityriasis lichenoides acuta ulcerating, HE 20x (5238)
PLEVA, HE 2.5x (1604)
PLEVA, HE 10x (1603)
PLEVA, HE 40x (1607)
Another case:
PLEVA, HE 40x (2255)
Another case:
PLEVA, HE 40x (2734)
Another case, dif. dg. lymphomatoid papulosis:
PLEVA or lymphomatoid papulosis, HE 60x (13236)
Pityriasis lichenoides acuta, HE 20x (4695) [zoomify]
Pityriasis lichenoides acuta, HE 20x (4585)
Another case:
Pityriasis lichenoides acuta, HE 20x (5237)
Another case:
Pityriasis lichenoides acuta, HE 60x (12837)
Another case:
Pityriasis lichenoides acuta, HE 40x (6446)
Another case:
Pityriasis lichenoides acuta, HE 40x (12724)
Another case:
Pityriasis lichenoides acuta, HE 60x (13906)
Another case, with superficial infiltration, patient several days on
steroids:
Pityriasis lichenoides acuta (Mucha Habermann), HE 20x (520)
Pityriasis lichenoides acuta (Mucha Habermann), HE 40x (521)
Another case with only superficial infiltration:
Pityriasis lichenoides acuta, PLEVA, HE 40x (2370)
Another case with only superficial infiltration:
Pityriasis lichenoides acuta, HE 20x (5254)
Pityriasis lichenoides with prominent hemorrhage (patient was
under anticoagulantion therapy (Warfarin):
Pityriasis lichenoides (Warfarin), HE 10x (146)
Pityriasis lichenoides (Warfarin), HE 20x (147)
Pityriasis lichenoides (Warfarin), HE 40x (148)
Pityriasis lichenoides (Warfarin), Goldner 20x (149)
Pityriasis lichenoides (Warfarin), Goldner 40x (150)
Fluorescence:
PLEVA, anti-fibrin, FITC 20x (597)
PLEVA, anti-fibrin, FITC 40x (598)
PLEVA, anti-fibrin, FITC 20x (640)
Clinical signs:
Histology:
Superficial lymphocytic infiltrate, slight exocytosis, sometimes slight spongiosis, parakeratosis, slight vacuolar degeneration of the basal layer.
Pictures
Pityriasis lichenoides chronica:
Pityriasis lichenoides chronica, HE 20x (5235)
Pityriasis lichenoides chronica, HE 20x (1592)
Another case:
Pityriasis lichenoides chronica, HE 20x (5234)
Pityriasis lichenoides chronica, HE 10x (1589)
Another case:
Pityriasis lichenoides chronica, HE 20x (5236)
Pityriasis lichenoides chronica, HE 10x (1590)
Pityriasis lichenoides chronica, HE 40x (1591)
Another case:
Pityriasis lichenoides chronica, HE 60x (10278)
Pityriasis lichenoides chronica, HE 60x (10279)
Another case:
Pityriasis lichenoides chronica, HE 20x (5394)
Etiology, pathogenesis:
Clinical signs:
herald patch, a (usually) single, red, slightly elevated patch, size 2 – 5 cm
Pictures
Pityriasis rosea Gibert, widespread dissemination:
Pityriasis rosea, non-inflammatory, CLINIC (876)
Pityriasis rosea Gibert with the herald plaque:
Pityriasis rosea, non-inflammatory, CLINIC (877)
Pityriasis rosea, herald patch with pityriasiform scales:
Pityriasis rosea, non-inflammatory, CLINIC (878)
Pityriasis rosea:
Pityriasis rosea, CLINIC (3247)
Pityriasis rosea, CLINIC (3249)
Pityriasis rosea, CLINIC (3250)
Pityriasis rosea, CLINIC (3251)
Pityriasis rosea, CLINIC (3252)
Pityriasis rosea, CLINIC (3253)
Pityriasis rosea, CLINIC (3254)
Pityriasis rosea, CLINIC (3255)
Pityriasis rosea, CLINIC (3256)
Pityriasis rosea, CLINIC (3248)
Pityriasis rosea:
Pityriasis rosea, Macro (3904)
Pityriasis rosea, Macro (3905)
Pityriasis rosea, Macro (3906)
Pityriasis rosea, Macro (3903)
Pityriasis rosea, Macro (3907)
Pityriasis rosea:
Pityriasis rosea, CLINIC (5830)
Pityriasis rosea, CLINIC (5831)
Histology:
Perivascular infiltrate in upper dermis (lymphocytes), slight epidermotropism. Slight spongiosis, slight acanthosis, scattered necrotic keratinocytes, focal parakeratosis, dermal hemorrhage.
Pictures
Pityriasis rosea:
Pityriasis rosea, HE 20x (151)
Pityriasis rosea, HE 40x (152)
Another case:
Pityriasis rosea, HE 40x (10713)
Another case:
Pityriasis rosea, HE 40x (2317)
Another case:
Pityriasis rosea, HE 40x (3526)
Another case:
Pityriasis rosea, HE 40x (3617)
Another case:
Pityriasis rosea, HE 20x (4944) [zoomify]
Another case:
Pityriasis rosea, HE 20x (4945) [zoomify]
Another case:
Pityriasis rosea, HE 20x (5396)
Another case:
Pityriasis rosea, HE 40x (12629)
Pityriasis rosea, HE 20x (5397)
Another case:
Pityriasis rosea, HE 20x (5398)
Another case:
Pityriasis rosea, HE 20x (5399)
Another case:
Pityriasis rosea, HE 60x (10865)
Pityriasis rosea, HE 60x (10866)
Another case:
Pityriasis rosea, HE 60x (10867)
Another case:
Pityriasis rosea, HE 60x (12113)
Pityriasis rosea, HE 60x (12114)
Another case:
Pityriasis rosea, HE 40x (12722)
Another case:
Pityriasis rosea, HE 40x (12628)