Skin

• 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

• cutaneous pleomorphic spindle cell tumors
  4 July 2017

  pleomorphic spindle cell skin tumors; pleomorphic spindle cell tumors of the skin
  Videos
  atypical fibroxanthoma (AFX) vs other cutaneous pleomorphic spindle cell tumors https://youtu.be/zdWFmSoouXM

• hypertrophic lichen sclerosus
  28 June 2017

  Images
  Hypertrophic lichen sclerosus https://twitter.com/LinskeyKaty/status/879496539785318400
  See also
  lichen sclerosus

• sclerodermoid GVHD
  25 June 2017

  Images
  Sclerodermoid GVHD https://twitter.com/FungMaxwell/status/878492468487929858 https://twitter.com/FungMaxwell/status/878491601475035136
  See also
  GVH / GVHD
  sclerodermoid anomalies

• cutaneous myxoma
  21 June 2017

  superficial angiomyxoma WKP
  Definition: A cutaneous myxoma, a.k.a. superficial angiomyxoma, consists of a multilobulated myxoid mass containing stellate or spindled fibroblasts with pools of mucin forming cleft-like spaces. There is often a proliferation of blood vessels and an inflammatory infiltrate.
  Immunostaining is positive for vimentin, negative for cytokeratin and desmin, and variable for CD34, Factor VIIIa, SMA, MSA and S-100.
  Clinically, it may present as solitary or (...)

• basal cell carcinoma with reticulated pattern
  20 June 2017

  Images
  basal cell carcinoma with reticulated pattern https://twitter.com/JMGardnerMD/status/876979193552220164
  See also
  basal cell carcinoma
  reticulated pattern

• cutaneous nodule
  20 June 2017

  cutaneous nodules
  Examples
  cutaneous inflammation cutaneous rheumatoid nodule juvenile xanthogranuloma granuloma annulare cutaneous sarcoidosis necrobiosis lipoidica
  cutaneous tumors / cutaneous neoplasia dermatofibroma leiomyoma neurofibroma spindle cell lipoma dermatofibrosarcoma protuberans DFSP
  See also
  cutaneous anomalies cutaneous macroscopical anomalies

• tinea nigra
  19 June 2017

  Definition: Tinea nigra is a superficial mycosis caused by Hortaea werneckii
  Images
  Tinea nigra / Hortaea werneckii https://twitter.com/rorestre54/status/869342859748663297

• lichen simplex chronicus
  17 June 2017

  Lichen simplex chronicus has marked hyperkeratosis, focal parakeratosis, a prominent granular cell layer, elongated rete and perivascular and interstitial inflammation.

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