Skin

• eosinophilic skin diseases
  13 March 2018

  eosinophilic dermatoses
  Definition: Eosinophilic skin diseases, commonly termed as eosinophilic dermatoses, refer to a broad spectrum of skin diseases characterized by eosinophil infiltration and/or degranulation in skin lesions, with or without blood eosinophilia.
  The majority of eosinophilic dermatoses lie in the allergy-related group, including allergic drug eruption, urticaria, allergic contact dermatitis, atopic dermatitis, and eczema.
  Parasitic infestations, arthropod bites, and (...)

• multiple nevi lipomatosis cutaneous superficialis
  3 March 2018

  Hamartome lipomateux superficiel de Hoffmann-Zurhelle; Nevus lipomatosis cutaneous superficialis of Hoffmann-Zurhelle; multiple nevi lipomatosis cutaneous superficialis of Hoffmann-Zurhelle
  Nevus lipomatosus cutaneous superficialis (NLCS) is a rare hamartomatous skin lesion histologically characterised by the presence of mature fat tissue within the dermis.
  Clinically, two types of NLCS can be distinguished:
  a multiple type of Hoffmann-Zurhelle
  a solitary type.
  Histologically, the (...)

• dermal perivascular lymphocytic infiltration
  25 January 2018

  Examples
  lichen sclerosus et atrophicus
  morphea https://twitter.com/SGottesmanMD/status/1088560929212715008
  See also
  dermal lymphocytic infiltration
  perivascular lymphocytic infiltration

• anomalies of hair follicles
  25 January 2018

  Examples
  loss of hair follicles

• eyeliner sign
  27 December 2017

  Definition: “Eyeliner sign” is seen in squamous cell carcinoma in situ. Atypical keratinocytes fill epidermis but spare basal layer (line of normal basal keratinocytes under the atypical ones resembles eyeliner 👁).
  Melanoma in situ does not have this pattern.
  Images
  “Eyeliner sign” is seen in squamous cell carcinoma in situ. https://twitter.com/JMGardnerMD/status/945671045452836870

• granulomatous cutaneous inflammation
  13 September 2017

  Dermal granulomatous and necrobiotic reaction patterns
  Etiology
  epithelioid and gigantocellular cutaneous inflammation interstitial granulomatous dermatitis interstitial granulomatous drug reaction cutaneous sarcoidosis / sarcoidosis cutaneous tuberculosis cutaneous mycosis berylliosis
  necrobiotic grnauloma annular elastolytic giant cell granuloma granuloma annulare necrobiosis lipoidica diabeticorum necrobiotic xanthogranuloma rheumatoid nodule /rheumatic nodule
  foreign body (...)

• cutaneous granulomatous inflammation
  13 September 2017

  Definition
  Diagnosis
  Etiology
  See also
  cutaneous anomalies
  cutaneous diseases

• diagnosis of cutaneous tumors
  12 September 2017

  Localization
  epidermal tumors
  dermal tumors
  hypodermal tumors
  Types
  squamous cell tumors
  adnexal tumors
  melanocytic tumors
  conjonctive tumors / mesenchymal tumors
  Appearance
  squamous cell differenciation
  basaloid differenciation
  See also
  cutaneous tumors

• hidradenitis
  18 July 2017

  Types
  eccrine hidradenitis
  apocrine hidradenitis
  Examples
  hidradenitis suppurativa Hidradenitis suppurativa. Sinus tract opens to the surface, inflamed granulation tissue, mixed inflammation with abscess formation, scarring.

• lichen planus pemphigoides
  6 July 2017

  Images
  lichen planus (clinically and histologically) + bullous pemphigoides = lichen planus pemphigoides : extensive subepidermal clefting and eosinophils are a clue to diagnosis. https://twitter.com/DrZembowicz/status/882695037225762816

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