Difference between revisions of "Pilar sheath acanthoma"

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===Images===
===Images===
<gallery>
<gallery>
Image:SkinTumors-P8190634.JPG | Possibly a PSA. (WC)
Image:SkinTumors-P8190634.JPG | Possibly a pilar sheath acanthoma. (WC)
</gallery>
</gallery>
www:
www:
*[http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3129125/figure/F1/ PSA (nih.gov)].<ref name=pmid21769237>{{Cite journal  | last1 = Bavikar | first1 = RR. | last2 = Gaopande | first2 = V. | last3 = Deshmukh | first3 = SD. | title = Postauricular pilar sheath acanthoma. | journal = Int J Trichology | volume = 3 | issue = 1 | pages = 39-40 | month = Jan | year = 2011 | doi = 10.4103/0974-7753.82136 | PMID = 21769237 }}</ref>
*[http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3129125/figure/F1/ Pilar sheath acanthoma (nih.gov)].<ref name=pmid21769237>{{Cite journal  | last1 = Bavikar | first1 = RR. | last2 = Gaopande | first2 = V. | last3 = Deshmukh | first3 = SD. | title = Postauricular pilar sheath acanthoma. | journal = Int J Trichology | volume = 3 | issue = 1 | pages = 39-40 | month = Jan | year = 2011 | doi = 10.4103/0974-7753.82136 | PMID = 21769237 }}</ref>
*[http://www.dermnet.org.nz/pathology/pilar-sheath-path.html Pilar sheath acanthoma (dermnet.org.nz)].
*[http://www.dermnet.org.nz/pathology/pilar-sheath-path.html Pilar sheath acanthoma (dermnet.org.nz)].



Revision as of 11:52, 30 October 2013

Pilar sheath acanthoma
Diagnosis in short

Possibly a pilar sheath acanthoma. H&E stain.

LM cystic cavity with branching - contains keratineous material, usually extends from surface to deep cutis, cyst lining consists of a thickened squamous epithelium
LM DDx trichofolliculoma, dilated pore of Winer, epidermal inclusion cyst
Gross raised lesion, central cavitation
Site skin - classically upper lip

Clinical history typically middle aged - 50s
Prevalence rare
Prognosis benign

Pilar sheath acanthoma is a rare benign skin lesion.

General

  • Rare.[1]
  • Considered a hamartoma.[1]
  • Does not regress like keratoacanthoma.
  • Typically middle aged individuals - median age in one series 55 years old, range 46-75 years old.[2]

Gross

  • Raised lesion with a central depression - somewhat similar to keratoacanthoma.
  • Classcially upper lip.[2]

DDx:

Microscopic

Features:[2]

  • Cystic cavity with branching:[3]
    • Contains keratineous material.
    • Usually extends from surface to deep cutis - like a hair shaft.
    • Cyst lining consists of a thickened squamous epithelium (acanthosis).
  • +/-Mitoses.

DDx:

Images

www:

See also

References

  1. 1.0 1.1 Vakilzadeh, F. (Jan 1987). "[Pilar sheath acanthoma].". Hautarzt 38 (1): 40-2. PMID 3557980.
  2. 2.0 2.1 2.2 Mehregan, AH.; Brownstein, MH. (Oct 1978). "Pilar sheath acanthoma.". Arch Dermatol 114 (10): 1495-7. PMID 718186.
  3. 3.0 3.1 3.2 Choi, YS.; Park, SH.; Bang, D. (Dec 1989). "Pilar sheath acanthoma--report of a case with review of the literature.". Yonsei Med J 30 (4): 392-5. PMID 2697113.
  4. Bavikar, RR.; Gaopande, V.; Deshmukh, SD. (Jan 2011). "Postauricular pilar sheath acanthoma.". Int J Trichology 3 (1): 39-40. doi:10.4103/0974-7753.82136. PMID 21769237.