Skin

• follicular ostium
  17 August 2020

  follicular ostia
  Anomalies
  follicular ostium obstruction

• follicular occlusion syndrome
  30 July 2020

  Links
  Follicular occlusion syndrome
  https://dermnetnz.org/topics/follicular-occlusion-syndrome/

• biphasic basophilic dermal adnexal tumor
  28 July 2020

  Example
  eccrine spiradenoma : benign biphasic basophilic dermal adnexal tumor
  See also
  cutaneous adnexal tumors

• adnexal glandular tumors
  28 July 2020

  Types
  Apocrine differentiation papillary hidradenoma (papillary fronds, vulvar / perianal) tubular apocrine adenoma (epidermal connection)
  syringoma: small ducts with 2 rows of cells
  papillary eccrine adenoma: cystic ducts and papillary fronds
  papillated ducts open to epidermis papillary syringadenoma (scalp) nipple adenomatosis (nipple)
  mixed tumor ( chondroid syringoma ): chondromyxoid stroma and tubular or anastomosing glands
  sebaceous hyperplasia (lobular arrangement (...)

• dermal nodules
  28 July 2020

  Diagnosis of cutaneous nodules
  Immunochemistry
  CK7+ dermal nodules
  BerEP4 dermal nodules
  See also
  cutaneous nodules
  cutaneous tumors

• cutaneous syphilis
  21 July 2020

  Images
  Secondary syphilis: psoriasiform pattern + lichenoid infiltrate with histiocytes great clue. Plasma cells ++ plasmacytic infiltration. https://twitter.com/JRamirezMD/status/782747788907991040 https://twitter.com/drmehrarohit/status/1285302923694505984

• cutaneous blue round cell tumors
  17 April 2020

  Etiology
  Merckel cell tumor / Merckel tumor
  metastatic neuroendocrine tumors
  metastatic blue round cell tumors neuroblastoma / neuroblastic tumors Ewing sarcoma / peripheral neuroectodermal tumors cutaneous localization of lymphomas
  See also
  cutaneous tumors

• invisible dermatoses
  17 April 2020

  invisible dermatosis
  Definition : ’Invisible dermatoses’ is a concept which has not received wide recognition, but is nevertheless very important both clinically and histologically.
  The term invisible dermatoses has been used in two contexts:
  a) Diseases, with out definite clinical features, and are therefore "invisible" to the clinician, but yet can be diagnosed by special investigations.
  b) Dermatoses which present with definite and obvious clinical features, but subtle or hidden (...)

• dermatoses
  17 April 2020

  dermatosis
  Definition : chronic cutaenous diseases.
  Examples
  " invisible dermatoses "

• syringotropism
  17 April 2020

  Examples
  lymphocytic syringotropism folliculotropic mycosis fungoides https://www.researchgate.net/figure/Syringotropism-atypical-lymphocytes-within-and-around-the-eccrine-glands-observed-in-the_fig4_263477318

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