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Thomas B. Fitzpatrick (December 19, 1919 – November 16, 2003) was an American dermatologist. He was Chairman of the Department of Dermatology at Harvard Medical School and Chief of the Massachusetts General Hospital Dermatology Service from 1959 to 1987. He has been described as "the father of modern academic dermatology" and as "the most ...
The Fitzpatrick scale has been criticized for its Eurocentric bias and insufficient representation of global skin color diversity. [9] The scale originally was developed for classifying "white skin" in response to solar radiation, [2] and initially included only four categories focused on white skin, with "brown" and "black" skin types (V and VI) added as an afterthought.
The dimple sign or Fitzpatrick's sign is a dermatological sign in which lateral pressure on the skin produces a depression. [ 1 ] [ 2 ] It is associated with dermatofibroma . [ 3 ]
An individual's natural skin color can vary from a dark brown to a nearly colorless pigmentation, which may appear white. In 1975, Harvard dermatologist Thomas B. Fitzpatrick devised the Fitzpatrick scale to describe the common tanning behavior of various skin types, as follows: [16] [17]
Computer vision researchers initially adopted the Fitzpatrick scale as a metric to evaluate how well a given collection of photos of people sampled the global population. [4] However, the Fitzpatrick scale was developed to predict the risk of skin cancer in lighter-skinned people, and did not initially include darker skin tones at all.
neglected squamous cell carcinoma skin of scalp Advanced squamous cell carcinoma, excision specimen. Note invasion subcutaneous tissue. Cutaneous squamous-cell carcinoma (cSCC), also known as squamous-cell carcinoma of the skin or squamous-cell skin cancer, is one of the three principal types of skin cancer, alongside basal-cell carcinoma and melanoma.
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The histological picture involves thinner, weaker attachments of the skin lesion itself to the normal skin – resulting in easier dislodgement. The formation of new blisters upon slight pressure (direct Nikolsky) and shearing of the skin due to rubbing (indirect Nikolsky) is a sign of pemphigus vulgaris, albeit not a 100% reliable diagnosis. [ 8 ]