Medical Dermatology Glossary
90 terms total — 24 showing — Last updated 15 Sep 2026
PN PN
Abbreviation for prurigo nodularis, a chronic neuroimmune skin disorder characterised by intensely pruritic hyperkeratotic nodules.
Desquamation
The shedding or peeling of the outer layers of the epidermis, occurring physiologically or as a feature of numerous skin...
DH
Standard abbreviation for Dermatitis Herpetiformis, used in clinical notes and research papers. Must be defined at first...
DLQI
Abbreviation for Dermatology Life Quality Index, a validated 10-item patient-reported questionnaire measuring the impact...
Erythema
Superficial reddening of the skin caused by dilation of blood capillaries, used as a descriptor or as part of named derm...
Erythrocyte Sedimentation Rate
A non-specific haematological blood test measuring the rate at which red blood cells settle in plasma, used as a general...
Erythroderma
Generalised, widespread reddening affecting 90% or more of the body surface area, representing a dermatological emergenc...
Erythroderma Grading
A clinical assessment framework used to classify the severity and systemic impact of erythroderma, informing management...
Erythrodermic Psoriasis
A severe, potentially life-threatening variant of psoriasis characterised by widespread erythema and scaling affecting m...
Excoriation
A superficial skin abrasion or scratch mark, typically self-inflicted, that removes the epidermis and may extend into th...
Fitzpatrick Scale
A six-point numerical classification system that categorises human skin types by their response to ultraviolet radiation...
FSP
Abbreviation for Fitzpatrick Skin Phototype, the six-category classification of skin response to UV radiation.
Granulomatous
Relating to or characterised by the formation of granulomas — discrete clusters of epithelioid macrophages representing...
Herald Patch
The initial solitary, oval, salmon-coloured plaque with a collarette of fine scaling that precedes the generalised erupt...
Hidradenitis Suppurativa
A chronic inflammatory skin disease characterised by recurrent painful nodules, abscesses, and sinus tracts in intertrig...
HS
Standard abbreviation for Hidradenitis Suppurativa in dermatology clinical and research documents.
Hurley Staging
A three-stage classification system (I–III) used to grade the clinical severity of hidradenitis suppurativa based on les...
Hyperpigmentation
Darkening of the skin due to an increase in melanin production or deposition, appearing as patches or macules darker tha...
Hypopigmentation
Reduction in skin pigmentation below the individual's baseline, resulting from decreased melanin production or loss of m...
Ichthyosis
A heterogeneous group of genetic or acquired skin disorders characterised by widespread, persistent scaling resembling f...
IGA
Abbreviation for Investigator's Global Assessment, a validated ordinal scale used in clinical trials to rate overall dis...
Keloid
A benign fibroproliferative scar that extends beyond the boundaries of the original wound, formed by excessive collagen...
Keratinocyte
The predominant cell type of the epidermis, responsible for producing keratin and forming the protective skin barrier.
Koebner Phenomenon
The appearance of new skin lesions at sites of cutaneous trauma or mechanical injury in patients with certain pre-existi...
Lentigo Maligna
A slow-growing form of melanoma in situ arising on chronically sun-damaged skin, typically presenting as an irregularly...