Acantholysis
Acantholysis implies a separation of the keratinocytes due to damage to the desmosomes (intercellular bridges). It may be inherited e.g. Darier’s and Hailey-Hailey disease or due to antibodies to intercellular antigens e.g. pemphigus vulgaris or pemphigus foliaceus... More
Acantholysis implies a separation of the keratinocytes due to damage to the desmosomes (intercellular bridges). It may be inherited e.g. Darier’s and Hailey-Hailey disease or due to antibodies to intercellular antigens e.g. pemphigus vulgaris or pemphigus foliaceus... More
Granulomatous dermatitis
A granuloma (pleural: granulomata) is a localized or ill-defined collection of epithelioid histiocytes often accompanied by a mixed inflammatory cell infiltrate consisting of lymphocytes, plasma cells and sometimes aggregates of neutrophils... More
A granuloma (pleural: granulomata) is a localized or ill-defined collection of epithelioid histiocytes often accompanied by a mixed inflammatory cell infiltrate consisting of lymphocytes, plasma cells and sometimes aggregates of neutrophils... More
Interface dermatitis
Interface dermatitis refers to a constellation of features including basal cell hydropic degeneration, keratinocyte necrosis (apoptosis), and a superficial perivascular and interstitial lymphohistiocytic inflammatory cell infiltrate... More
Interface dermatitis refers to a constellation of features including basal cell hydropic degeneration, keratinocyte necrosis (apoptosis), and a superficial perivascular and interstitial lymphohistiocytic inflammatory cell infiltrate... More
Lichenoid and lichenoid tissue reactions
The term lichenoid implies a constealtion of features:
- Hyperkeratosis & hypergranulosis
- Irregular (saw-tooth acanthosis)
- Interface change with cytoid bodies... More
The term lichenoid implies a constealtion of features:
- Hyperkeratosis & hypergranulosis
- Irregular (saw-tooth acanthosis)
- Interface change with cytoid bodies... More
Pityriasiform dermatoses
The term Pityriasis comes from the Greek pityron=bran and is used to refer to diseases characterized by fine branny scales. Pityriasis rosea indicates rose colored scales... More
The term Pityriasis comes from the Greek pityron=bran and is used to refer to diseases characterized by fine branny scales. Pityriasis rosea indicates rose colored scales... More
Psoriasiform dermatoses
Features of Psoriasis:
- Confluent parakeratosis
- Munro microabscesses
- Spongiform pustules of Kogoj... More
Features of Psoriasis:
- Confluent parakeratosis
- Munro microabscesses
- Spongiform pustules of Kogoj... More
Pustular dermatoses
Common causes of Pustular dermatoses:
- Pustular psoriasis
- Reiter’s syndrome
- Superficial pemphigus... More
Common causes of Pustular dermatoses:
- Pustular psoriasis
- Reiter’s syndrome
- Superficial pemphigus... More
Spongiosis
Spongiosis is derived from the Latin & Greek term spongia and implies intercellular edema of the “spongy†(prickle cell) layer of the epidermis or mucosal squamous epithelia. Initially it results in separation of the keratinocytes making the desmosomes... More
Spongiosis is derived from the Latin & Greek term spongia and implies intercellular edema of the “spongy†(prickle cell) layer of the epidermis or mucosal squamous epithelia. Initially it results in separation of the keratinocytes making the desmosomes... More