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Dermatology

Cysts

Built from Dermatology, 5th Edition

What’s inside

4 sections · 111 slides

  1. 01

    Overview

    • What this topic covers
    • Three ways to sort a cutaneous cyst
    • Key features of cutaneous cysts
    • The myth of the 'sebaceous cyst'
    • Diagnostic approach to a cutaneous cyst
    • A reference table of the three categories
    • The three main categories of cutaneous cyst.
    • The three main categories of cutaneous cyst. (continued)
    • The three main categories of cutaneous cyst. (continued)

    9 slides

  2. 02

    Cysts With a Stratified Squamous Lining

    Skin-type epithelium, the largest and most familiar group

    • Epidermoid cyst: the most common skin cyst
    • Two follicular pores in an epidermoid cyst
    • Where the name 'infundibular cyst' comes from
    • Anatomic origin of follicular cysts
    • Conditions linked to multiple epidermoid cysts
    • Multiple scrotal cysts and calcification
    • Scrotal calcinosis from epidermoid cysts
    • How epidermoid cysts cause problems
    • From follicle disruption to painful rupture
    • Inflamed, ruptured epidermoid cyst
    • What the biopsy shows
    • Histopathology of an epidermoid cyst
    • Treating an epidermoid cyst
    • Dilated pore of Winer
    • Milia: tiny superficial cysts
    • Milia in newborns
    • Milium of the nipple
    • When milia are a clue to something else
    • Multiple milia in epidermolysis bullosa
    • Pathology and treatment of milia
    • Tricholemmal (pilar) cyst
    • Tricholemmal versus proliferating tricholemmal cyst
    • Why the wall looks different under the scope
    • Histopathology of a tricholemmal cyst
    • Diagnosis and treatment of a tricholemmal cyst
    • Verrucous cyst
    • Proliferating tricholemmal cyst
    • Proliferating tricholemmal cyst of the forehead
    • Large proliferating tricholemmal cyst of the scalp
    • How pathology tells this apart from cancer
    • Histopathology of a proliferating tricholemmal cyst
    • Treatment of a proliferating tricholemmal cyst
    • Proliferating epidermoid cyst
    • Pathology and treatment
    • Vellus hair cysts
    • Eruptive vellus hair cysts of the thigh
    • Diagnosis at the bedside
    • Histopathology of a vellus hair cyst
    • Treatment of vellus hair cysts
    • Steatocystoma: the only true 'sebaceous cyst'
    • Steatocystoma multiplex, clinical and histologic features
    • Steatocystoma multiplex of the arm
    • Pathology and a related 'no-sebaceous-gland' variant
    • Treatment of steatocystoma
    • Follicular hybrid cyst
    • Pigmented follicular cyst
    • Dermoid cyst
    • Ear pit (preauricular cyst)
    • Syndromes linked to ear pits
    • Pilonidal cyst
    • Related conditions and treatment

    51 slides

  3. 03

    Cysts With a Non-Stratified Squamous Lining

    Gland- and duct-type linings, often congenital in origin

    • Hidrocystoma: two sweat-gland-related cysts
    • Apocrine hidrocystoma of the eyelid
    • Apocrine hidrocystoma near the eye
    • Eccrine hidrocystomas of the eyelid and cheek
    • Apocrine versus eccrine hidrocystoma
    • What the biopsy shows in each type
    • Histopathology of an apocrine hidrocystoma
    • Histopathology of an eccrine hidrocystoma
    • Treating a hidrocystoma
    • Bronchogenic cyst
    • Pathology and treatment of bronchogenic cyst
    • Thyroglossal duct cyst
    • What confirms the diagnosis on biopsy
    • Histopathology of a thyroglossal duct cyst
    • Additional histopathology of a thyroglossal duct cyst
    • Branchial cleft cyst
    • Pathology and treatment
    • Cutaneous ciliated cyst and ciliated cyst of the vulva
    • Pathology, look-alikes, and treatment
    • Histopathology of a ciliated cyst of the vulva
    • Median raphe cyst
    • Omphalomesenteric duct cyst
    • Omphalomesenteric duct cyst, clinical and histologic features
    • Pathology, look-alikes, and treatment
    • Urachal cyst

    25 slides

  4. 04

    Cysts Without an Epithelial Lining

    'Pseudocysts' - cystic spaces with no true lining at all

    • Mucocele
    • Mucocele of the lower lip
    • A short-lived variant: superficial mucocele
    • Pathology and treatment of mucocele
    • Digital mucous cyst (pseudocyst)
    • Digital mucous cysts, three examples
    • Digital mucous cysts of the toes
    • What the biopsy shows
    • Histopathology of a digital mucous cyst
    • Additional histopathology of a digital mucous cyst
    • Treatment of digital mucous cyst
    • Ganglion (ganglion cyst)
    • Ganglion cyst of the wrist, clinical and histologic features
    • Pathology and treatment of a ganglion
    • Pseudocyst of the auricle
    • Pseudocyst of the auricle
    • Treatment of a pseudocyst of the auricle
    • Cutaneous metaplastic synovial cyst (pseudocyst)
    • Putting it together: how to think about a cyst
    • Recurring red flags to remember
    • References
    • References (continued)
    • References (continued)
    • References (continued)
    • References (continued)
    • Dermatology, 5th Edition (2-Volume Set)

    26 slides