Proliferating trichilemmal cyst
medical condition
Proliferating trichilemmal cysts (also known as a pilar tumor, proliferating follicular cystic neoplasm, proliferating pilar tumor, and proliferating trichilemmal tumor) is a cutaneous condition, characterized by proliferations of squamous cells forming scroll-like structures.
Signs and symptoms
The tumors, which are typically found in regions like the scalp with a high density of hair follicles, can be solid or solid cystic. Proliferating trichilemmal cyst frequently manifests clinically as a subcutaneous nodule that gradually grows into a big nodular mass. Rapid growth in some cases may be a sign of malignant development into cancer.
Diagnosis
Histologically, Proliferating trichilemmal cysts are distinguished by trichilemmal keratinization, which is the sudden change from nucleated epithelium to anucleated keratinized cells without a granular layer. The differential diagnosis include trichilemmal cyst and Turban tumor.
Treatment
Surgical excision is the treatment of choice for proliferating trichilemmal cysts.
Epidemiology
Proliferating trichilemmal cysts make up 0.1% of all skin tumors. Most patients with these tumors are older women, and 90% of patients with these lesions appear on the scalp.
See also
Trichilemmal cyst
List of skin conditions
References
Further reading
Kearns-Turcotte, Sélia; Thériault, Mimi; Blouin, Marie-Michèle (2022).
The public source identifies “Proliferating trichilemmal cyst” as medical condition. This brief keeps that definition visible, then builds a research path around Proliferating, trichilemmal and cyst.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Proliferating trichilemmal cyst”, the useful work is to connect “medical condition” to the records capable of establishing context and consequence.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 12, 2024. The linked authority identifier is Q7249604. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2022.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Proliferating trichilemmal cyst”, its source revision and the description used here.
- Expand the search: follow Proliferating trichilemmal cyst primary sources, Proliferating trichilemmal cyst archive and Proliferating research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Proliferating trichilemmal cyst”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Proliferating trichilemmal cyst” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.