Skin

• verrucous epidermal nevus
  30 January

  Definition : A verrucous epidermal nevus (VEN) is a skin disorder that commonly presents at birth and is frequently resistant to multiple treatment modalities.
  Epidermal nevi are a hamartomas of the skin and have multiple clinical variants including a verrucous type.
  A VEN consists of hyperplasia of the epidermis and typically appears as verrucous papules or well-demarcated papillomatous plaques that are skin-colored to brown.
  These tumors can be located anywhere, including the head, (...)

• verrucous epidermal hyperplasia
  30 January

  See also
  oral epidermal hyperplasia

• acanthosis nigricans
  30 January

  PO
  Differential diagnosis
  condyloma acuminata
  epidermal nevus
  seborrheic keratosis

• acantholytic dyskeratotic acanthoma
  19 January

  Definition : Acantholytic dyskeratotic acanthoma is a rare variant of epidermal acanthoma characterized pathologically by the presence of acantholysis and dyskeratosis.
  Variants
  can be multiple in allogenic transplant recipient (#31046909#, #30128341#)
  Open references
  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4131993/
  See also
  epidermal acanthoma : acanthomas

• large cell acanthoma
  19 January

  Definition : The large cell acanthoma presents as a slightly scaly tan macule on photodamaged skin.
  Clinical differential diagnosis
  lentigo senilis
  pigmented actinic keratosis
  flat and pigmented seborrheic keratosis.
  See also
  acanthomas

• epidermolysis
  19 January

  Adj. epidermolytic
  Examples
  epidermolytic hyperkeratosis
  epidermolytic acanthosis

• horn pseudocysts
  19 January

  horn pseudocyst
  Definition : intralesional cysts of loose keratin.
  Etiology / Examples
  seborrheic keratosis

• intraepidermal tumors
  19 January

  intra-epidermal proliferation ; epidermal in situ tumors
  Examples
  seborrheic keratosis / KS clonal seborrheic keratosis
  hidroacanthoma simplex / intraepidermal poroma / in situ poroma
  intraepidermal carcinomas / epidermal in situ carcinomas
  See also
  epidermal tumors

• eccrine porocarcinoma
  19 January

  PO
  Synopsis
  May remain completely intraepidermal ( in situ porocarcinoma ) but is more often associated with an invasive dermal component
  poroma cells
  typical ductal lumina
  cytological features of malignancy nuclear and cytoplasmic pleomorphism, nuclear hyperchromatism and mitotic activity
  Prognosis
  Prone to have local recurrence (17%) and is occasionally associated with nodal metastases (19%); however, systemic spread is rare (...)

• dermal nodules
  19 January

  WKP
  Definition : Cutaneous nodules are formed by cutaneous nevi, cutaneous neoplasms / cutaneous tumors, and cutaneous cysts.
  Types
  solitary cutaneous nodule
  multiple cutaneous nodules
  Types
  epidermal nodules
  dermal nodules
  Examples
  cutaneous inflammation cutaneous rheumatoid nodule juvenile xanthogranuloma granuloma annulare cutaneous sarcoidosis necrobiosis lipoidica
  cutaneous tumors / cutaneous neoplasia dermatofibroma (...)

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