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Tests and diagnosis
By Mayo Clinic staffIn addition to taking a complete medical history and checking the affected area of skin, your doctor may remove a small skin sample (biopsy) for examination under a microscope. Often, the biopsy is sent to a pathologist who has special expertise in diagnosing skin samples.
A suspected basal cell carcinoma is often biopsied by shaving off the top layers of skin with a surgical blade. Tumors that have spread deeper into the skin may be partially or completely removed (incisional or excisional biopsy). Because all biopsies are likely to leave a small scar, talk to your doctor about the types of biopsies and their potential for scarring before having the procedure.
- Wood GS, et al. Nonmelanoma skin cancers: Basal cell and squamous cell carcinomas. In: Abeloff MD, et al. Abeloff's Clinical Oncology. 4th ed. Philadelphia, Pa.: Churchill Livingstone; 2008. http://www.mdconsult.com/das/book/body/119479231-3/0/1709/83.html?tocnode=55017273&fromURL=83.html#4-u1.0-B978-0-443-06694-8..50078-6--cesec29_2759. Accessed Feb. 6, 2009.
- Basal cell carcinoma. American Academy of Dermatology. http://www.aad.org/public/publications/pamphlets/sun_basal.html. Accessed Feb. 6, 2009.
- Detailed guide: Skin cancer - basal and squamous cell. American Cancer Society. http://www.cancer.org/docroot/CRI/content/CRI_2_4_1X_What_is_skin_cancer_51.asp. Accessed Feb. 6, 2009.
- Urist MM, et al. Melanoma and cutaneous malignancies. In: Townsend CM, et al. Townsend: Sabiston Textbook of Surgery. 18th ed. Philadelphia, Pa.: W.B. Saunders; 2007.http://www.mdconsult.com/das/book/body/119479231-5/0/1565/1.html?tocnode=54736195&fromURL=1.html#4-u1.0-B978-1-4160-3675-3..X5001-1--TOP_1. Accessed Feb. 6, 2009.
- Burns J. Bartter's syndrome and basal cell carcinoma. In: Ferri FF. Ferri's Clinical Advisor 2009. St. Louis, Mo.: Mosby; 2008. http://www.mdconsult.com/das/book/body/119515236-9/801847095/1701/79.html#4-u1.0-B978-0-323-04134-8..50005-7--cesec92_1598. Accessed Feb. 9, 2009.
- Sunscreen. The Skin Cancer Foundation. http://www.skincancer.org/the-scfs-guide-to-sunscreens.html. Accessed Feb. 6, 2009.
- Basal cell carcinoma of the skin. National Cancer Institute. http://www.cancer.gov/cancertopics/pdq/treatment/skin/HealthProfessional/page5. Accessed Feb. 6, 2009.
- Ridky TW. Nonmelanoma skin cancer. Journal of the American Academy of Dermatology. 2007;57:484.
- Neoplasia. In: Kumar V, et al. Robbins and Cotran's Pathologic Basis of Disease. 7th ed. Philadelphia, Pa.: Saunders Elsevier; 2005. http://www.mdconsult.com/das/book/body/119515236-4/801835407/1249/66.html#4-u1.0-B0-7216-0187-1..50011-0--cesec92_600. Accessed Feb. 6, 2009.
- Arsenic toxicity exposure pathways. U.S. Department of Health and Human Services. http://www.atsdr.cdc.gov/csem/arsenic/exposure_pathways.html. Accessed Feb. 6, 2009.
- Common questions about diet and cancer. American Cancer Society. http://www.cancer.org/docroot/PED/content/PED_3_2X_Common_Questions_About_Diet_and_Cancer.asp?sitearea=PED. Accessed Feb. 6, 2009.
- Food Groups to Encourage. In: U.S. Department of Health and Human Services and U.S. Department of Agriculture. Dietary Guidelines for Americans. 6th Edition. Washington, D.C.: U.S. Government Printing Office; 2005. http://www.health.gov/DietaryGuidelines/dga2005/document/html/chapter5.htm. Accessed Feb 6, 2009.
- Premalignant and malignant nonmelanoma skin tumors. In: Habif TP. Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 4th ed. New York, N.Y.: Mosby; 2004. http://www.mdconsult.com/das/book/body/119515236-5/0/1195/157.html?tocnode=51442435&fromURL=157.html#4-u1.0-B0-323-01319-8..50023-6_2588. Accessed Feb. 6, 2009.
