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> | ||
** | **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
PSA. (WC)
www:
See also
References
- ↑ 1.0 1.1 Vakilzadeh, F. (Jan 1987). "[Pilar sheath acanthoma].". Hautarzt 38 (1): 40-2. PMID 3557980.
- ↑ 2.0 2.1 2.2 Mehregan, AH.; Brownstein, MH. (Oct 1978). "Pilar sheath acanthoma.". Arch Dermatol 114 (10): 1495-7. PMID 718186.
- ↑ 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.
- ↑ 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.