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Brain
Diagnosis
Anatomy-Based Diagnoses
Skull, Scalp, and Meninges
Nonneoplastic and Tumor-like Disorders
Sebaceous Cyst
Sebaceous Cyst
Anne G. Osborn, MD, FACR
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KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Clinical Issues
TERMINOLOGY
Abbreviations
Trichilemmal cyst
(TC) is preferred terminology
Sebaceous cyst (SC) commonly used but incorrect
Variant = proliferating trichilemmal tumor (PTT)
Synonyms
PTT also called "pilar" or "turban" tumor
Definitions
Keratin-containing cyst
Lined by stratified squamous epithelium
IMAGING
General Features
Imaging Recommendations
CT Findings
MR Findings
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
Selected References
Abdou AG: Cytologic findings of proliferating trichilemmal tumor (PTT) of scalp. Diagn Cytopathol. 48(1):86-9, 2020
Strait AM et al: Proliferating pilar tumor: a rare cutaneous entity mimicking breast malignancy on imaging. Breast J. ePub, 2020
Wollina U et al: Squamous cell carcinoma associated with trichilemmal cyst: a rare collision tumor. Dermatol Ther. e13260, 2020
Adegun OK et al: Proliferating trichilemmal tumour: diagnostic challenge on core biopsy. BMJ Case Rep. 12(2), 2019
Friedrich RE et al: Multiple trichilemmal cysts of the scalp. Anticancer Res. 39(8):4253-8, 2019
He P et al: Trichilemmal cyst: clinical and sonographic features. J Ultrasound Med. 38(1):91-6, 2019
Kawaguchi M et al: CT and MRI features of scalp lesions. Radiol Med. 124(10):1049-61, 2019
Related Anatomy
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Related Differential Diagnoses
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References
Tables
Tables
KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Clinical Issues
TERMINOLOGY
Abbreviations
Trichilemmal cyst
(TC) is preferred terminology
Sebaceous cyst (SC) commonly used but incorrect
Variant = proliferating trichilemmal tumor (PTT)
Synonyms
PTT also called "pilar" or "turban" tumor
Definitions
Keratin-containing cyst
Lined by stratified squamous epithelium
IMAGING
General Features
Imaging Recommendations
CT Findings
MR Findings
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
Selected References
Abdou AG: Cytologic findings of proliferating trichilemmal tumor (PTT) of scalp. Diagn Cytopathol. 48(1):86-9, 2020
Strait AM et al: Proliferating pilar tumor: a rare cutaneous entity mimicking breast malignancy on imaging. Breast J. ePub, 2020
Wollina U et al: Squamous cell carcinoma associated with trichilemmal cyst: a rare collision tumor. Dermatol Ther. e13260, 2020
Adegun OK et al: Proliferating trichilemmal tumour: diagnostic challenge on core biopsy. BMJ Case Rep. 12(2), 2019
Friedrich RE et al: Multiple trichilemmal cysts of the scalp. Anticancer Res. 39(8):4253-8, 2019
He P et al: Trichilemmal cyst: clinical and sonographic features. J Ultrasound Med. 38(1):91-6, 2019
Kawaguchi M et al: CT and MRI features of scalp lesions. Radiol Med. 124(10):1049-61, 2019
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