Pilar sheath acanthoma: Difference between revisions
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{{SI}} | |||
{{Infobox medical condition | |||
| name = Pilar sheath acanthoma | |||
| image = [[File:SkinTumors-P8190634.JPG|left|thumb|Pilar sheath acanthoma]] | |||
| caption = Clinical presentation of pilar sheath acanthoma | |||
| specialty = [[Dermatology]] | |||
| symptoms = Small, solitary, skin-colored [[nodule]] | |||
| onset = Typically in [[adulthood]] | |||
| duration = [[Chronic (medicine)|Chronic]] | |||
| causes = Unknown | |||
| risks = [[Genetic predisposition]] | |||
| diagnosis = [[Skin biopsy]] | |||
| differential = [[Trichofolliculoma]], [[Basal cell carcinoma]] | |||
| treatment = [[Surgical excision]] | |||
| prognosis = Excellent | |||
| frequency = Rare | |||
}} | |||
{{Short description|A rare benign skin tumor}} | {{Short description|A rare benign skin tumor}} | ||
A '''pilar sheath acanthoma''' is a rare, benign [[skin tumor]] that typically presents as a small, solitary, flesh-colored nodule. It is most commonly found on the face, particularly around the upper lip and nose. This tumor is considered a type of [[follicular tumor]], originating from the [[hair follicle]] sheath. | A '''pilar sheath acanthoma''' is a rare, benign [[skin tumor]] that typically presents as a small, solitary, flesh-colored nodule. It is most commonly found on the face, particularly around the upper lip and nose. This tumor is considered a type of [[follicular tumor]], originating from the [[hair follicle]] sheath. | ||
==Clinical Presentation== | ==Clinical Presentation== | ||
Pilar sheath acanthomas are usually asymptomatic and are often discovered incidentally during a routine skin examination. They appear as small, dome-shaped papules or nodules, typically measuring less than 1 cm in diameter. The surface of the lesion is smooth, and the color can range from flesh-toned to slightly erythematous. | Pilar sheath acanthomas are usually asymptomatic and are often discovered incidentally during a routine skin examination. They appear as small, dome-shaped papules or nodules, typically measuring less than 1 cm in diameter. The surface of the lesion is smooth, and the color can range from flesh-toned to slightly erythematous. | ||
==Histopathology== | ==Histopathology== | ||
Histologically, pilar sheath acanthomas are characterized by a well-circumscribed proliferation of basaloid cells. These cells form a cystic structure with a central keratin-filled cavity. The tumor is composed of lobules of squamous epithelium with peripheral palisading of the basal cell layer. The central cavity is lined by keratinizing squamous epithelium, resembling the outer root sheath of a hair follicle. | Histologically, pilar sheath acanthomas are characterized by a well-circumscribed proliferation of basaloid cells. These cells form a cystic structure with a central keratin-filled cavity. The tumor is composed of lobules of squamous epithelium with peripheral palisading of the basal cell layer. The central cavity is lined by keratinizing squamous epithelium, resembling the outer root sheath of a hair follicle. | ||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
The differential diagnosis for pilar sheath acanthoma includes other benign follicular tumors such as [[trichofolliculoma]], [[trichoepithelioma]], and [[sebaceous hyperplasia]]. It is important to distinguish pilar sheath acanthoma from malignant lesions such as [[basal cell carcinoma]] and [[squamous cell carcinoma]]. | The differential diagnosis for pilar sheath acanthoma includes other benign follicular tumors such as [[trichofolliculoma]], [[trichoepithelioma]], and [[sebaceous hyperplasia]]. It is important to distinguish pilar sheath acanthoma from malignant lesions such as [[basal cell carcinoma]] and [[squamous cell carcinoma]]. | ||
==Treatment== | ==Treatment== | ||
Treatment is generally not necessary for pilar sheath acanthoma due to its benign nature. However, if the lesion is cosmetically concerning or if there is uncertainty in the diagnosis, surgical excision may be performed. Complete excision is usually curative, and recurrence is rare. | Treatment is generally not necessary for pilar sheath acanthoma due to its benign nature. However, if the lesion is cosmetically concerning or if there is uncertainty in the diagnosis, surgical excision may be performed. Complete excision is usually curative, and recurrence is rare. | ||
==Prognosis== | ==Prognosis== | ||
The prognosis for individuals with pilar sheath acanthoma is excellent. These tumors do not have malignant potential and do not metastasize. Once excised, they typically do not recur. | The prognosis for individuals with pilar sheath acanthoma is excellent. These tumors do not have malignant potential and do not metastasize. Once excised, they typically do not recur. | ||
==See also== | |||
== | |||
* [[Trichofolliculoma]] | * [[Trichofolliculoma]] | ||
* [[Trichoepithelioma]] | * [[Trichoepithelioma]] | ||
* [[Basal cell carcinoma]] | * [[Basal cell carcinoma]] | ||
* [[Squamous cell carcinoma]] | * [[Squamous cell carcinoma]] | ||
[[Category:Skin neoplasms]] | [[Category:Skin neoplasms]] | ||
[[Category:Benign neoplasms]] | [[Category:Benign neoplasms]] | ||
Latest revision as of 20:47, 8 April 2025
Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD medical weight loss NYC and sleep center NYC
| Pilar sheath acanthoma | |
|---|---|
 | |
| Synonyms | N/A |
| Pronounce | N/A |
| Specialty | Dermatology |
| Symptoms | Small, solitary, skin-colored nodule |
| Complications | N/A |
| Onset | Typically in adulthood |
| Duration | Chronic |
| Types | N/A |
| Causes | Unknown |
| Risks | Genetic predisposition |
| Diagnosis | Skin biopsy |
| Differential diagnosis | Trichofolliculoma, Basal cell carcinoma |
| Prevention | N/A |
| Treatment | Surgical excision |
| Medication | N/A |
| Prognosis | Excellent |
| Frequency | Rare |
| Deaths | N/A |
A rare benign skin tumor
A pilar sheath acanthoma is a rare, benign skin tumor that typically presents as a small, solitary, flesh-colored nodule. It is most commonly found on the face, particularly around the upper lip and nose. This tumor is considered a type of follicular tumor, originating from the hair follicle sheath.
Clinical Presentation[edit]
Pilar sheath acanthomas are usually asymptomatic and are often discovered incidentally during a routine skin examination. They appear as small, dome-shaped papules or nodules, typically measuring less than 1 cm in diameter. The surface of the lesion is smooth, and the color can range from flesh-toned to slightly erythematous.
Histopathology[edit]
Histologically, pilar sheath acanthomas are characterized by a well-circumscribed proliferation of basaloid cells. These cells form a cystic structure with a central keratin-filled cavity. The tumor is composed of lobules of squamous epithelium with peripheral palisading of the basal cell layer. The central cavity is lined by keratinizing squamous epithelium, resembling the outer root sheath of a hair follicle.
Differential Diagnosis[edit]
The differential diagnosis for pilar sheath acanthoma includes other benign follicular tumors such as trichofolliculoma, trichoepithelioma, and sebaceous hyperplasia. It is important to distinguish pilar sheath acanthoma from malignant lesions such as basal cell carcinoma and squamous cell carcinoma.
Treatment[edit]
Treatment is generally not necessary for pilar sheath acanthoma due to its benign nature. However, if the lesion is cosmetically concerning or if there is uncertainty in the diagnosis, surgical excision may be performed. Complete excision is usually curative, and recurrence is rare.
Prognosis[edit]
The prognosis for individuals with pilar sheath acanthoma is excellent. These tumors do not have malignant potential and do not metastasize. Once excised, they typically do not recur.
