Lichenoid Dermatitis

Lichenoid Dermatitis
Paul K. Shitabata, M.D.
Dermatopathology Institute
Wednesday, May 22, 13
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Lichen Striatus
Wednesday, May 22, 13
Wednesday, May 22, 13
Histopathology



Wednesday, May 22, 13
Lichenoid dermatitis
with superficial and deep
perivascular and
periadnexal infiltrate
Lymphocytes
Variable epidermal
changes
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Lichen Planus
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Histopathology





Wednesday, May 22, 13
Epidermal hyperplasia
Hypergranulosis
Usually no parakeratosis
Saw tooth interface
Lymphocytes
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement
Wednesday, May 22, 13
Erythema Multiforme
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Histopathology




Wednesday, May 22, 13
Sparse lichenoid
interface
Dyskeratotic cells
May have eos
Variable degrees of
blistering
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement
Wednesday, May 22, 13
Graft Versus Host Disease
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Histopathology



Wednesday, May 22, 13
Cell poor infiltrate
Satellitosis
Late changes of
scleroderma
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
PLEVA
(Mucha-Habermann Disease)
Wednesday, May 22, 13
Wednesday, May 22, 13
PLEVA
Pityriasis Lichenoides
PLC
Wednesday, May 22, 13
Other
Histopathology





Wednesday, May 22, 13
Parakeratosis
Superficial and deep PV
Lichenoid interface
Lymphocytes
Lymphocytic vasculitis?
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Discoid Lupus Erythematosus
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Histopathology







Wednesday, May 22, 13
Follicular plugging
Epidermal atrophy
Solar elastosis
SDPV
Interface changes
Periadnexal infiltrate
Dermal mucinosis
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Mycosis Fungoides
Wednesday, May 22, 13
Wednesday, May 22, 13
Wednesday, May 22, 13
Histopathology



Wednesday, May 22, 13
Intercalation of basal
keratinocytes with
lymphocytes
Pautrier microabscesss
Intraepithelial
lymphocytes larger than
intradermal
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement
Additional Lichenoid Diseases
Wednesday, May 22, 13
Wednesday, May 22, 13
Fixed Drug Reaction
Wednesday, May 22, 13
Wednesday, May 22, 13
Dermatophytosis
Wednesday, May 22, 13
Wednesday, May 22, 13
Contact Dermatitis
Wednesday, May 22, 13
Wednesday, May 22, 13
Photoallergic Dermatitis
Wednesday, May 22, 13
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Wednesday, May 22, 13
Follicular Involvement