Visit: Dermatopathology site;
Visit: Sebaceous Hyperplasia
Sebaceous gland hyperplasia of the foreskin.Clin Exp Dermatol. 2009 Apr;34(3):372-4. Epub 2008 Dec 9.
Two men, aged in their 20s, presented with multiple, soft, rounded papules on the prepuce. The lesions were centrally umbilicated, resembling molluscum contagiosum, but clearly distinct from Tyson's glands. Surface microscopy showed well-defined, milky-white, bag-shaped structures, which under histological examination were found to be sebaceous glands with various features of hyperplasia. A lymphocytic T-cell infiltrate, closely associated with progressive degeneration and destruction of the sebocytes, was visible around the glands. In the differential diagnosis of penile papular lesions, this unusual clinicalnpresentation supported by dermatoscopy is consistent with preputial sebaceous gland hyperplasia. As both patients had a prominent T-cell infiltration, it ispossible that under inflammatory stimulation, sebaceous glands undergo hypertrophy and gradual central involution.
Comparative clinicopathological study of intraoral sebaceous hyperplasia and sebaceous adenoma.Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Jan;107(1):100-4.
OBJECTIVE: The objective of this study was to compare the clinicopathological features of oral sebaceous hyperplasia and sebaceous adenoma. STUDY DESIGN:Clinical data, microscopical characteristics, and ki-67 immunoexpression were comparatively analyzed on 2 intraoral sebaceous adenomas, 6 intraoral sebaceous hyperplasias, and 21 normal intraoral sebaceous glands. RESULTS: Clinically, sebaceous glands presented as multiple separated papules, sebaceous hyperplasias as a single enlarged papule, and sebaceous adenoma as a well-defined nodule.Microscopically, sebaceous adenoma presented an increased number of lobules, smaller lobules, and a greater number of germinative/squamous cells. Sebaceous hyperplasia also had an increased number of lobules and fewer number of germinative/squamous cells, as compared to normal oral sebaceous glands. Ki-67 expression was seen only in germinative cells and counts were higher in sebaceousadenomas followed by hyperplasias and normal glands. CONCLUSIONS: Sebaceous hyperplasias and adenomas showed different clinical, microscopic, andproliferative characteristics, suggesting the usefulness of the studied criteria on diagnosis of these uncommon oral lesions.