Skin cysts: Difference between revisions
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[[File:Relative incidence of cutaneous cysts.jpg|thumb|Relative incidence of cutaneous cysts.<ref>Pakistan: {{cite journal|last1=Kamyab|first1=Kambiz|last2=Kianfar|first2=Nika|last3=Dasdar|first3=Shayan|last4=Salehpour|first4=Zahra|last5=Nasimi|first5=Maryam|title=Cutaneous cysts: a clinicopathologic analysis of 2,438 cases|journal=International Journal of Dermatology|year=2020|issn=0011-9059|doi=10.1111/ijd.14808}}</ref>]] | [[File:Relative incidence of cutaneous cysts.jpg|thumb|Relative incidence of cutaneous cysts.<ref>Pakistan: {{cite journal|last1=Kamyab|first1=Kambiz|last2=Kianfar|first2=Nika|last3=Dasdar|first3=Shayan|last4=Salehpour|first4=Zahra|last5=Nasimi|first5=Maryam|title=Cutaneous cysts: a clinicopathologic analysis of 2,438 cases|journal=International Journal of Dermatology|year=2020|issn=0011-9059|doi=10.1111/ijd.14808}}</ref>]] | ||
{|class="wikitable" | {|class="wikitable" | ||
! Location !! Main diagnoses | ! Location !! Main diagnoses<ref name=Bolognia/> | ||
|- | |- | ||
! Face | ! Face | ||
| Line 37: | Line 37: | ||
*Proliferating epidermoid (infundibular) cyst | *Proliferating epidermoid (infundibular) cyst | ||
|- | |- | ||
! Axilla and groin | |||
| | |||
*Steatocystoma | |||
*Epidermoid cyst | |||
|- | |||
! Preauricular | |||
| | |||
*Ear pit cyst | |||
*Epidermoid cyst | |||
|- | |||
! Upper gluteal cleft and sacrococcygeal area | |||
| | |||
*Pilonidal cyst | |||
|} | |} | ||
===Non-stratified squamous epithelium=== | ===Non-stratified squamous epithelium=== | ||
{|class="wikitable" | |||
! Location !! Main diagnoses<ref name=Bolognia/> | |||
|- | |||
! Face | |||
| | |||
*Hidrocystoma | |||
:*Eccrine at lower eyelid and cheek | |||
:*Apocrine at eyelid margin | |||
|- | |||
! Suprasternal notch | |||
| | |||
*Bronchogenic cyst (infants) | |||
|- | |||
! Midline anterior neck | |||
| | |||
*Thyroglossal duct cyst | |||
|- | |||
! Lateral neck, preauricular, mandibular | |||
|- | |||
*Brachial cleft cyst (teenagers and young adults) | |||
|- | |||
! Lower extremities | |||
| | |||
*Cutaneous ciliated cyst (young women) | |||
|- | |||
! Labia majora | |||
| | |||
*Ciliated cyst of the vulva | |||
|- | |||
! Ventral glans and penile shaft | |||
| | |||
*Median raphe cyst | |||
|- | |||
! Umbilical or periumbilical | |||
| | |||
*Omphalomesenteric duct cyst | |||
|} | |||
===Absence of epithelium (pseudocyst)=== | |||
{|class="wikitable" | |||
! Location !! Main diagnoses<ref name=Bolognia/> | |||
|- | |||
! Oral mucosa | |||
| Mucocele (lower labial) | |||
|- | |||
! Dorsal aspect of distal phalanx of finger or toe | |||
| | |||
*Digital mucous cyst/pseudocyst | |||
|- | |||
! Wrist | |||
| | |||
*Ganglion | |||
|- | |||
! Scaphoid fossa of the ear | |||
| | |||
*Pseudocyst of the auricle (adult men) | |||
|- | |||
! Sites of surgical trauma | |||
| | |||
*Cutaneous metaplastic synovial cyst/pseudocyst | |||
|} | |||
=== | ==Diagnoses== | ||
===Epidermoid cyst=== | |||
[[File:Histopathology of epidermoid cyst.jpg|thumb|Epidermoid cyst]] | |||
Typical findings:<ref>{{cite web|url=http://www.pathologyoutlines.com/topic/skintumornonmelanocytickeratinouscystepidermal.html|title=Skin nonmelanocytic tumor - Cysts - Epidermal (epidermoid) type|author= V. Claire Vaughan, M.D., Joshua Wisell, M.D.|website=pathology Outlines}} Topic Completed: 9 May 2019. Revised: 13 December 2019<7ref> | |||
*Stratified squamous epithelium with a granular layer | |||
*Cyst wall does not contain eccrine glands, sebaceous glands or hair follicles | |||
*Abundant keratin flakes in cyst lumen | |||
*Often giant cell granuloma in ruptured cysts, similar to foreign body granuloma | |||
{{Bottom}} | |||
Revision as of 08:44, 4 March 2020
Author:
Mikael Häggström [note 1]
Microscopic evaluation
The main initial clue is the lining of the cyst, being either stratified squamous epithelium, non-stratified squamous epithelium, or absence of epithelium (pseudocysts):[1]
Stratified squamous epithelium
| Location | Main diagnoses[1] |
|---|---|
| Face |
|
| Scalp |
|
| Trunk |
|
| Pelvic, anogenital |
|
| Axilla and groin |
|
| Preauricular |
|
| Upper gluteal cleft and sacrococcygeal area |
|
Non-stratified squamous epithelium
- Brachial cleft cyst (teenagers and young adults)
| Location | Main diagnoses[1] |
|---|---|
| Face |
|
| Suprasternal notch |
|
| Midline anterior neck |
|
| Lateral neck, preauricular, mandibular | |
| Lower extremities |
|
| Labia majora |
|
| Ventral glans and penile shaft |
|
| Umbilical or periumbilical |
|
Absence of epithelium (pseudocyst)
| Location | Main diagnoses[1] |
|---|---|
| Oral mucosa | Mucocele (lower labial) |
| Dorsal aspect of distal phalanx of finger or toe |
|
| Wrist |
|
| Scaphoid fossa of the ear |
|
| Sites of surgical trauma |
|
Diagnoses
Epidermoid cyst
Typical findings:<ref>V. Claire Vaughan, M.D., Joshua Wisell, M.D.. Skin nonmelanocytic tumor - Cysts - Epidermal (epidermoid) type. pathology Outlines. Topic Completed: 9 May 2019. Revised: 13 December 2019<7ref>
- Stratified squamous epithelium with a granular layer
- Cyst wall does not contain eccrine glands, sebaceous glands or hair follicles
- Abundant keratin flakes in cyst lumen
- Often giant cell granuloma in ruptured cysts, similar to foreign body granuloma
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Patholines:Authorship for details.
Main page
References
- ↑ 1.0 1.1 1.2 1.3 page 1917 in: Bolognia, Jean (2018) (in de). Dermatology . Philadelphia, Pa: Elsevier. ISBN 978-0-7020-6342-8. OCLC 1011508489.
- ↑ Pakistan: Kamyab, Kambiz; Kianfar, Nika; Dasdar, Shayan; Salehpour, Zahra; Nasimi, Maryam (2020). "Cutaneous cysts: a clinicopathologic analysis of 2,438 cases ". International Journal of Dermatology. doi:. ISSN 0011-9059.
Image sources