Sebaceoma (Sebaceous Epithelioma) David Cassarino, MD, PhD Key Facts Terminology Sebaceous epithelioma is older term (discouraged) Benign proliferation of mature sebaceous cells with predominant basaloid cell population Etiology/Pathogenesis Some cases…
Sebaceous Hyperplasia Christine J. Ko, MD Key Facts Clinical Issues Commonly on face Yellow to flesh-colored to slightly pink papule Often there is central dell Often biopsied to rule out…
Fibrofolliculoma and Trichodiscoma David Cassarino, MD, PhD Key Facts Terminology Closely related hamartomas with follicular and mesenchymal differentiation Etiology/Pathogenesis Multiple lesions are strongly correlated with Birt-Hogg-Dubé syndrome High risk of…
Pilomatrixoma and Pilomatrical Carcinoma Senait W. Dyson, MD David Cassarino, MD, PhD Key Facts Terminology Calcifying epithelioma of Malherbe Etiology/Pathogenesis Derived from matrix of hair follicle Clinical Issues Pilomatrixoma Relatively…
Tricholemmoma David Cassarino, MD, PhD Key Facts Terminology Tricholemmoma (TL) Benign clear cell adnexal proliferation with external root sheath differentiation Subtype: Desmoplastic tricholemmoma (dTL) Etiology/Pathogenesis Some cases are associated with…
Tricholemmal Carcinoma David Cassarino, MD, PhD Key Facts Terminology Tricholemmal carcinoma (TLC) Low-grade malignant tumor of clear-staining squamous cells with tricholemmal differentiation Clinical Issues Occurs in sun-damaged skin of the…
Inverted Follicular Keratosis Senait W. Dyson, MD David Cassarino, MD, PhD Key Facts Terminology Inverted follicular keratosis (IFK) Benign tumor of follicular infundibulum Clinical Issues Common benign tumor found mostly…
Pilar Sheath Acanthoma David Cassarino, MD, PhD Key Facts Terminology Pilar sheath acanthoma (PSA) Mature adnexal proliferation composed of thickened epithelium with enlarged pale-staining keratinocytes Clinical Issues Usually in middle-aged…
Trichoblastoma David Cassarino, MD, PhD Key Facts Terminology Trichoblastoma (TB) Synonym: Giant trichoepithelioma Benign adnexal tumor showing primitive follicular differentiation Clinical Issues Head and neck area, especially the scalp Rare…
Dilated Pore of Winer David Cassarino, MD, PhD Key Facts Terminology Dilated pore of Winer (DPW) Enlarged follicular structure with acanthotic squamous lining and central keratin-filled space Etiology/Pathogenesis May be…
