[Sebaceous filaments (author's transl)].
Sebaceous filaments are cylindrical tubes of whitish-yellowish color, which can be expressed from areas of the face rich in sebaceous follicles by pinching the skin or by the cyanoacrylat-technique. Sebaceous filaments are most commonly found in the centrofacial areas and the alae nasae in postpuberal individuals with large facial pores and seborrhea. Sebaceous filaments are composed of a skeleton of 10-30 horny cell layers which enclose a mixture of bacteria, sebaceous lipid, corneocyte fragments and one hair. Following the expression of the filament the follicle refills within 30 days. The various portions of sebaceous follicles (acro- and infrainfundibulum) and the follicular contents are presented at the light microscopial and ultrastructural level. Follicles containing sebaceous filaments have a conspicuous granular layer and no acanthosis. Sebaceous filaments should be differentiated from a microcomedo and trichostasis spinolosa. They are a common morphological variant of sebaceous follicles.
D000152:Acne Vulgaris; D000328:Adult; D004847:Epithelial Cells; D004848:Epithelium / Q000648:ultrastructure; D006801:Humans; D008290:Malassezia / Q000648:ultrastructure; D008297:Male; D008835:Micrococcaceae / Q000648:ultrastructure; D011425:Propionibacterium acnes / Q000648:ultrastructure; D012627:Sebaceous Glands / Q000382:microbiology / Q000648:ultrastructure*; D012629:Sebum / Q000382:microbiology; D012867:Skin / Q000648:ultrastructure; D012871:Skin Diseases / Q000382:microbiology
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