Skin

• spitzoid melanocytic tumors
  17 April

  Examples
  spitzoid Melanoma
  Spitz nevus
  see also
  melanocytic tumors

• cutaneous metastasis
  29 March

  Open references
  Cutaneous Metastases: A Review and Diagnostic Approach to Tumors of Unknown Originhttps://www.archivesofpathology.org/doi/10.5858/arpa.2018-0051-RA

• erosive pustular dermatosis
  9 March

  Erosive pustular dermatosis of the scalp (EPDS) is a rare inflammatory disease with predominance in the elderly population.
  Clinically, the condition is characterized by sterile pustules and chronic crusted erosions. Bacteriologic and mycologic workups tend to have negative findings, and histopathologic evaluation findings are nonspecific.
  Affected areas undergo a continuous cycle of healing and recurrence, resulting in atrophic skin with new areas of pustules and erosions. If left (...)

• pagetoid appearance
  18 February

  pagetoid spread
  Examples
  Paget disease of the breast / Paget disease of the nipple https://twitter.com/Ho_Khanh_MD/status/1097413310041993217
  DCIS with pagetoid spread
  pagetoid spread into the rete testis
  pagetoid SCC in situ / pagetoid squamous cell carcinoma
  See also
  large clear cells in squamous cell epithelium

• nodular and cystic apocrine hidradenoma with mucinous metaplasia
  17 February

  Examples
  nodular and cystic apocrine hidradenoma with mucinous metaplasia https://twitter.com/SGottesmanMD/status/1097115296639475713
  See also
  apocrine hidradenoma https://twitter.com/tonitatirado/status/839070507794321408

• adnexal tumors
  16 February

  cutaneous adnexal tumors
  Main types
  sebaceous tumors
  sweat gland tumors
  cutaneous follicular tumors / hair follicle tumors
  Types
  sebaceaous tumors
  sebaceous hyperplasia
  sebaceous adenoma
  sebaceoma
  sebaceous carcinoma
  nevus sebaceus
  sebaceous neoplasms in Mui-Torre syndrome
  sweat gland tumors
  cystadenoma
  hidroacanthoma simplex
  poroma
  dermal duct tumor
  hidradenoma
  malignant acrospiroma
  porocarcinoma
  hidradenocarcinoma
  spiradenoma
  cylindroma (...)

• pustule
  14 February

  Images
  Acute generalized exanthematous pustulosis https://twitter.com/JRamirezMD/status/1096003232671899648
  See also
  pustule
  pustulosis / pustuloses

• pustuloses
  14 February

  pustulosis
  Images
  Acute generalized exanthematous pustulosis https://twitter.com/JRamirezMD/status/1096003232671899648
  See also
  pustule
  pustulosis / pustuloses

• thrombi in small dermal vessels
  9 February

  Images
  Mixed cryoglobulinemia https://twitter.com/GeronimoJrLapac/status/929801815184629760
  See also
  vasculitis

• dermal vessels
  9 February

  Anomalies
  thrombi in small dermal vessels
  leukocytoclastic vasculitis
  Images
  Mixed cryoglobulinemia https://twitter.com/GeronimoJrLapac/status/929801815184629760
  Examples
  cotrimoxazole-associated mixed type 2 cryoglobulinemia
  See also
  vasculitis

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