Difference between revisions of "Pilar sheath acanthoma"

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==Microscopic==
==Microscopic==
Features:<ref name=pmid718186/>
Features:<ref name=pmid718186/>
*Cystic cavity with:
*Cystic cavity with branching:<ref>{{Cite journal  | last1 = Choi | first1 = YS. | last2 = Park | first2 = SH. | last3 = Bang | first3 = D. | title = Pilar sheath acanthoma--report of a case with review of the literature. | journal = Yonsei Med J | volume = 30 | issue = 4 | pages = 392-5 | month = Dec | year = 1989 | doi =  | PMID = 2697113 | URL = http://www.eymj.org/Synapse/Data/PDFData/0069YMJ/ymj-30-392.pdf }}</ref>
**Keratineous material.
**Contains keratineous material.
**Usually extends from surface to deep cutis - like a hair shaft.
**Usually extends from surface to deep cutis - like a hair shaft.
**Lining consists of a thickened squamous epithelium.
**Lining consists of a thickened squamous epithelium.

Revision as of 11:39, 30 October 2013

Pilar sheath acanthoma
Diagnosis in short

Pilar sheath acanthoma. H&E stain.
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.
    • Lining consists of a thickened squamous epithelium.

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. 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.