Skin

• granuloma annulare
  15 June 2004

  Annular granuloma PO
  Definition: Granuloma annulare (GA) is a benign inflammatory, self-limiting granulomatous dermatoses that is seen in both adults and children . Females are more commonly affected than males. The lesions may involve skin and/or subcutaneous tissue. The etiology of GA is unknown.
  Granuloma annulare is a dermatosis, usually self-limited, of unknown etiology and characterized by necrobiotic (collagenolytic) dermal papules that often assume an annular configuration. (...)

• sucutaneous angiolipoma
  14 June 2004

  Lipohemangioma
  Definition: Angiolipomas are typically subcutaneous and often painful.
  Images
  Angiolipoma: "angio" component; painful; intravasc thrombi https://twitter.com/JRamirezMD/status/811189246442741760
  Digital slides
  UI:738 - Subcutaneous angiolipoma (Lipohemangioma)
  Subtypes
  cellular angiolipoma
  Histogenesis
  Because they lack the typical cytogenetic abnormalities seen in ordinary lipomas, some have speculated that they may actually be of vascular origin but with an (...)

• angiolymphoid hyperplasia with eosinophilia
  14 June 2004

  synonymes: epithelioid hemangioma, pseudopyogenic granuloma; cutaenous HALE; "Epithelioid hemangioma," "Histiocytoid hemangioma," "Inflammatory angiomatous nodule," "Intravenous atypical vascular proliferation," "Papular angioplasia," "Inflammatory arteriovenous hemangioma," "Pseudopyogenic granuloma" eM WP
  Definition: Angiolymphoid hyperplasia with eosinophilia (ALHE) is a tumor of skin and subcutaneous tissues composed of vessels, a proliferation of a distinctive type of endothelial (...)

• tinea versicolor
  14 June 2004

  synonyms: pityriasis versicolor

• cutaneous sebaceous carcinoma
  10 June 2004

  Images
  Cutaneous sebaceous carcinoma https://twitter.com/Konzult_/status/723984883744428033 https://twitter.com/Levelsx5/status/735204830055137280
  Sebaceous carcinoma, squamoid variant https://twitter.com/Patholwalker/status/1243073758446768128
  Clinical features
  affects older patients (mean age 62)
  predilection for Asian
  typically located in ocular sites (eyelids) > extraocular sites (head and neck) > trunk, genitalia, and extremities.
  sometimes associated with Muir-Torre (...)

• sebaceoma
  10 June 2004

  WKP PO
  Association
  Muir-Torre syndrome (various sebaceous neoplasms, squamous cell carcinomas of the kerato-acanthoma type, and carcinomas of the GI tract, larynx, and other sites)
  Variants
  Sebaceoma, rippled variant https://twitter.com/Patholwalker/status/1241986585752555520
  cystic sebaceoma
  Images
  ripple pattern sebaceoma image : https://twitter.com/KUSAURAP/status/719351058024124416 https://twitter.com/drjamescarton/status/664475754420391937
  Sebaceoma (sebaceous (...)

• syringoma
  10 June 2004

  Benign tumor of eccrine origin PO
  Clinical
  Usually multiple small discrete white or yellow papules (1-4 mm diameter) located upper cheeks, below eyelids, genitalia, and thighs. Plaquelike, milialike, linear, and eruptive variants.
  Images
  Syringoma: commas, paisleys, tadpoles https://twitter.com/RyanHickMD/status/696743080511156224 https://twitter.com/pipoulou_kgb/status/849588288851759104
  seborrheic keratosis and syringoma (...)

• dermatophytic infections
  9 June 2004

  dermatophytoses; dermatophytosis
  Images
  Dermatophyte "sandwich" sign / dirty scale. parakeratosis and hyperkeratosis squishing the filaments https://twitter.com/JRamirezMD/status/782000175095042048
  kerion https://twitter.com/ASDPTweets/status/725981780969316352
  Differential diagnosis
  eczematous dermatitis including nummular eczema and contact dermatitis
  seborrheic dermatitis
  psoriasis
  pityriasis rosea
  cutaneous drug reactions
  DON’T forget special stains!
  Localization (...)

• NICH
  9 June 2004

  noninvoluting congenital hemangioma

• RICH
  9 June 2004

  rapidly involuting congenital hemangioma

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