Keloid
Keloid Definition: Keloids are hypertrophic, smooth, hard growths or scars that occur on the skin as a result of excessive scar formation. Keloids may rarely occur spontaneously. They may develop on any part of the body and extend beyond the original wound margins. The upper chest, shoulders, ears and neck are especially prone to keloid […]
Androgenetic Alopecia
Androgenetic Alopecia Definition: Androgenic Alopecia (AGA) is one of the most common types of hair loss and is characterized by the androgen-dependent reduction of terminal hairs into thin vellus hairs (1). Etiology: AGA is a hereditary disorder for which there is no known cure and is mainly influenced by androgens such as dihydrotestosterone (1). Epidemiology: […]
Alopecia Areata
Alopecia Areata Definition: A common autoimmune condition that is marked by abrupt, non-scarring hair loss on the scalp and other parts of the body go (1) Etiology: Many etiologies have been proposed but it is believed that the condition is caused by an autoimmune attack on the hair follicles, leading to hair loss. In addition, […]
Hidradenitis Suppurativa
Hiradentitis Suppurativa Definition: Hidradenitis SUppurativa (HS), also known as acne inversa, is a chronic inflammatory skin condition that affects the apocrine-gland-bearing skin. It is characterized by painful, persistent deep-seated nodules, abscessed as skin tunnels that may develop purulent discharge and result in scarring. Etiology: HS development may have genetic, environmental and behavioural influences. There is an […]
Acne Keloidalis Nuchae
Acne Keloidalis Nuchae Definition: Acne keloidalis nuchae (AKN) also known as folliculitis keloidalis nuchae (FKN) is a chronic debilitating condition that is characterized by keloid-life plaques that usually affects the occipital area or nape of the neck. Untreated AKN can lead to scarring folliculitis. Epidemiology: Acne keloidalis nuchae is thought to predominantly affect men of […]
Acne Keloidalis Nuchae
Acne Keloidalis Nuchae Definition: Acne keloidalis nuchae (AKN) also known as folliculitis keloidalis nuchae (FKN) is a chronic debilitating condition that is characterized by keloid-life plaques that usually affects the occipital area or nape of the neck. Untreated AKN can lead to scarring folliculitis. Epidemiology: Acne keloidalis nuchae is thought to predominantly affect men of […]
Hemangioma
Hemangioma Definition: A hemangioma is a benign proliferative blood vessel neoplasm. Hemangiomas can arise early or later in life, and there are several hemangiomas. The most common type is a cherry angioma. Congenital hemangiomas are present at birth while infantile hemangiomas appear later within the first few weeks of life. Etiology: Hemangiomas are caused by […]
Pemphigus Vulgaris
Author: Shahnawaz Towheed MS2, Y, Miller-Monthrope, Dermatologist/Dermatopathologist, Toronto, Canada, 2024 Definition: Pemphigus Vulgaris is an autoimmune blistering disorder affecting the skin and mucous membranes. Epidemiology: It has an incidence of approximately 1-5 cases per million people per year and predominantly affects middle-aged and older adults, with a higher prevalence in certain ethnic groups, such as […]
Pemphigus Vulgaris
Author: Shahnawaz Towheed MS2, Y, Miller-Monthrope, Dermatologist/Dermatopathologist, Toronto, Canada, 2024 Definition: Pemphigus Vulgaris is an autoimmune blistering disorder affecting the skin and mucous membranes. Epidemiology: It has an incidence of approximately 1-5 cases per million people per year and predominantly affects middle-aged and older adults, with a higher prevalence in certain ethnic groups, such as […]
Epidermal Nevus
Author: Kawaroreet Karwal MS2, Y, Miller-Monthrope, Dermatologist/Dermatopathologist, Toronto, Canada, 2024 Definition: Epidermal nevus is a benign skin condition characterized by the overgrowth of epidermal cells, resulting in the formation of warty or verrucous plaques. Etiology: These lesions typically present at birth or develop early in childhood and can persist throughout life. Epidemiology: Epidermal nevi are […]