Integumentary System
Skin, Hair Follicle - Dilatation and Cyst
Narrative





Whenever present, cysts should be diagnosed and documented as present but should not be graded. Cysts in the skin should be diagnosed as “Skin – Cyst”; no modifier is necessary. Findings that are secondary to a large or ruptured cyst, such as inflammation or fibrosis, need not be diagnosed but should be described in the pathology narrative.
Peckham JC, Heider K. 1999. Skin and subcutis. In: Pathology of the Mouse: Reference and Atlas (Maronpot RR, Boorman GA, Gaul BW, eds). Cache River Press, Vienna, IL, 555-612.
Abstract: http://www.cacheriverpress.com/books/pathmouse.htmRamot Y, Nyska A, Lieuallen W, Maly A, Flake G, Kissling E, Brix A, Malarkey DE, Hooth MJ. 2009. Inflammatory and chloracne-like skin lesions in B6C3F1 mice exposed to 3,3',4,4'-tetrachloroazobenzene for 2 years. Toxicology 265:1-9.
Abstract: https://www.ncbi.nlm.nih.gov/pubmed/19737593Elwell MR, Stedman MA, Kovatch RM. 1990. Skin and subcutis. In: Pathology of the Fischer Rat: Reference and Atlas (Boorman GA, Eustis SL, Elwell MR, Montgomery CA, MacKenzie WF, eds). Academic Press, San Diego, 261-277.
Abstract: https://www.ncbi.nlm.nih.gov/nlmcatalog/9002563Klein-Szanto AJP, Conti CJ. 2002. Skin and oral mucosa. In: Handbook of Toxicologic Pathology, 2nd ed (Haschek WM, Rousseaux CG, Wallig MA, eds). Academic Press, San Diego, 2:85-116.
Abstract: http://www.sciencedirect.com/science/book/9780123302151Hair follicle dilatation-ectatic hair follicles with intraluminal keratin (arrows) in a male B6C3F1 mouse from a chronic study.