{"url":"/signup-modal-props.json?lang=us"}, Morgan M, Jones J, Knipe H, et al. 47 0 obj 0000017921 00000 n Vojvodich SM, Ballagh RH, Cramer H, Lampe HB. Goldblum JR, et al., eds. The prognosis for noncancerous (benign) thyroid nodules is great. If small nodules are less than 1 cm or filled with fluid, Biopsy of Thyroid Nodules 0000005181 00000 n Asik M, Gunes F, Binnetoglu E, et al. 0000018873 00000 n Partially cystic thyroid nodules in ultrasound-guided fine needle Ultrasound-Based Diagnostic Classification for Solid and Partially I have a thyroid nodule being watched last year it was cystic and this year it is now solid. Brophy C, Stewart J, O'Donovan N, McCarthy J, Murphy M, Sheahan P. Otolaryngol Head Neck Surg. Thyroid nodule. Kitahara CM, et al. All rights reserved. SUBCENTIMETER SOLID THYROID ISTHMIC NODULE. A Paleo diet template is low-carb, dairy-free, and gluten-free, and could be a good place to start. << Wong R, Farrell SG, Grossmann M. Thyroid nodules: diagnosis and management. https://www.uptodate.com/contents/search. Mixed cystic and solid thyroid nodule | HealthTap Online Doctor If a benign thyroid nodule remains unchanged, you may never need treatment. If the doctor recommends removal of your thyroid (thyroidectomy), you may not even have to worry about a scar on your neck. Thyroid fine needle aspiration biopsy (FNAB): Change In Thyroid Nodule Volume Calculator, Find an Endocrinology Thyroid Specialist, http://www.thyroid.org/cancer-of-the-thyroid-gland, http://www.thyroid.org/what-are-thyroid-nodules, Clinical Thyroidology for the Public (CTFP). Thyroid nodules are extremely common. Most cystic nodules are partly solid structures that have undergone cystic degeneration (mixed or complex nodules) . If your thyroid nodule is benign, there are two main natural treatment options to improve your thyroid nodules: One of the most common reasons for thyroid nodules is thyroid autoimmunity, especially Hashimotos thyroiditis. Thyroid nodules are small lumps or bumps in your thyroid gland, which is located at the base of your neck. 1998-2023 Mayo Foundation for Medical Education and Research (MFMER). Malignancy risk of thyroid nodules with minimal cystic changes: a multicenter retrospective study. Studies report on possibility of thyroid cancer in about 5% of thyroid nodules. HlUyPgdHGF1hQT$!8;\b DVo`hV\A$XqjkZL|{^ZE4=:6.::DHoQ:{25?z2Sr3MH 41}"y1%*kw&G);Hn3Rl5)L3v'aRm.d_9R\{no5|YHQcUT The doctor uses a very thin needle to withdraw cells from the thyroid nodule. In some cases, you may need to decrease your iodine intake by using a low-iodine diet. In contrast, other studies have shown that ultrasound features such as coarse calcifications, more tall than wide, irregular borders and increased blood flow within the nodule can be helpful to identify thyroid cancer. 0000031286 00000 n Most thyroid nodules dont cause symptoms. An official website of the United States government. Large cystic/solid thyroid nodules: a potential false-negative fine 1 Most thyroid nodules are detected incidentally when imaging is performed for another indication. You have a thyroid nodule that is larger than 1 cm or is growing. Kim J, Jung S, Kim M, Kim T, Byun J. Differentiation of Benign and Malignant Thyroid Nodules Based on the Proportion of Sponge-Like Areas on Ultrasonography: Imaging-Pathologic Correlation. Accessed Oct. 31, 2019. Its simple: Most people treated with RFA are back to their normal activities the next day with no problems. In contrast, others have reported that 39% of benign thyroid nodules increase in size during follow-up, with cystic nodules being more likely to Nature Reviews Endocrinology. They often dont need treatment, and only about 1% of benign thyroid nodules cause thyroid disease, which is treatable. September 25, 2020. (2) The Ruscio Institute is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. 2016; doi:10.1038/nrendo.2016.110. The numbers in the parentheses (1, 2, 3) are clickable links to peer-reviewed scientific papers. /Metadata 39 0 R You can, however, try to decrease your risk of developing them by managing certain risk factors. Others are mixed. However, if you have several nodules or large nodules, you may be able to see them. /StemV 200 Diagnostic accuracy of fine needle aspiration biopsy versus postoperative histopathology for diagnosing thyroid malignancy. After a thyroid surgery, you'll need lifelong treatment with levothyroxine to supply your body with thyroid hormone. Hypoechoic Nodule on Thyroid: Cancer Risk, Next Steps, Outlook Elselvier; 2018. https://www.clinicalkey.com. Microcalcifications were found in 38% of cancerous nodules and only in 5% of benign, non-cancerous nodules. /Widths [ 222 333 222 278 444 444 444 444 444 444 444 444 444 444 222 222 *Inquiries relevant to the practice only. << /Font << /F1 43 0 R /F2 46 0 R /F3 49 0 R /F4 52 0 R /F5 55 0 R /F6 58 0 R Depending on the type of thyroid nodule, it can be solid or filled with fluid, in which case its called a thyroid cyst. HHS Vulnerability Disclosure, Help /T 343984 611 556 611 556 556 500 611 556 889 556 556 500 278 250 278 500 500 278 500 Learn about potential causes of thyroid nodules, from benign tissue overgrowth to. Cystic thyroid nodules - UpToDate As has been noted for completely solid nodules, microcalcifications are associated with an increased risk of malignancy. A thyroid nodule is an unusual lump (growth) of cells on your thyroid gland. Follow-up of atypia and follicular lesions of undetermined significance in thyroid fine needle aspiration cytology. Eighteen of the nodules were malignant and 317 were benign, yielding a malignancy rate of 5.4%. In fact, you may be able to resolve your thyroid nodules with simple treatment and lifestyle options. Solid hypoechoic 1.4 x 0.6 x 0.4 cm nodule in the right thyroid isthmus TR 4. This article contains scientific references. /Type /FontDescriptor Zhong C, Qu C, Wang B, Liang S, Zeng B. Probiotics for Preventing and Treating Small Intestinal Bacterial Overgrowth: A Meta-Analysis and Systematic Review of Current Evidence. Check for errors and try again. [18, 19, 20]. /Ascent 722 /FontBBox [ -153 -250 992 986 ] If concern arises about the possibility of cancer, the doctor may simply recommend monitoring the nodule over time to see if it grows. [Epub ahead of print]. When nodules with microcalcifications are seen, the doctor may advise to have Thyroid nodules on ct. us found 10+ nodules, 2 largest about 2.5 cm and are "mixed cystic and solid". Have your thyroid. WebLikely benign: Thyroid lesions are classified as solid or cystic or a combination of both. Thyroid gland. dx benign Methods: /Flags 262176 0000004788 00000 n There is no relationship here. Thyroid cancer is one of the most treatable kinds of cancer. 93 0 obj Thyroid nodules even the occasional cancerous ones are treatable. %%EOF Epub 2022 May 4. /MediaBox [ 9 9 594 792 ] >> Fine-needle aspiration biopsy. Often, your doctor may discover thyroid nodules during a routine medical exam. 2018;30(1):46-50. and transmitted securely. thyroid nodule Ultrasonography. The https:// ensures that you are connecting to the Composition: [cystic/almost completely cystic (0), spongiform (0), mixed cystic and solid (1), solid/almost completely solid Thyroid nodule differential diagnosis There were more malignancies in group 2 than the other groups (p = 0.040). Become a Gold Supporter and see no third-party ads. The logic here is that since the thyroid hormone is partly made of iodine, supplementing will help increase thyroid hormone levels. Partially cystic thyroid nodules: ultrasound findings of malignancy. However, over 75% of nodules found in children and adolescents are noncancerous (benign). In some cases, nodules that take up less of the isotope called cold nodules are cancerous. Background: Thyroid nodules are common, and a large proportion has mixed cystic and solid components. /Length 3091 Its simply a sign that your doctor may need to do additional testing, such as a biopsy. sharing sensitive information, make sure youre on a federal Thyroid nodule | Radiology Reference Article | Radiopaedia.org Nodules are often biopsied to make sure no cancer is present. 1. Sometimes, your doctor detects a thyroid nodule when you have an imaging test, such as an ultrasound, CT or MRI scan, to evaluate another condition in your head or neck. WebA total of 49% of the nodules were between 1 to 1.9 cm, 27% between 2 to 2.9 cm, 14% between 3 to 3.9cm and 11% were greater than 4cm. endobj /CapHeight 722 Multiple criteria exist from societies in different subspecialties and biopsy thresholds vary among institutions. Written by Dr. Michael Ruscio, DC on 2022 Apr-Jun;18(2):187-193. doi: 10.4183/aeb.2022.187. A diagnosis of cancer was made in 10.5% of nodules measuring 1 1.9 cm. In assessing a lump or nodule in your neck, one of your doctor's main goals is to rule out the possibility of cancer. Microcalcifications: Small flecks of calcium within a thyroid nodule, usually seen as small bright spots on ultrasonography. A publication of the American Thyroid Association, Summaries for the Public from Clinical Thyroidology (from recent articles in Clinical Thyroidology) doi: 10.1097/MD.0000000000008689. Efficacy of the Autoimmune Protocol Diet as Part of a Multi-disciplinary, Supported Lifestyle Intervention for Hashimotos Thyroiditis. Comment on "Partially Cystic Thyroid Nodules on Ultrasound: Probability of Malignancy and Sonographic Differentiation". Disclaimer. "Mayo," "Mayo Clinic," "MayoClinic.org," "Mayo Clinic Healthy Living," and the triple-shield Mayo Clinic logo are trademarks of Mayo Foundation for Medical Education and Research. endobj Risk of thyroid cancer based on thyroid ultrasound findings Kellerman RD, et al. The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). /XHeight 505 26th ed. The aim of this study was to assess Increased levels of insulin-like growth factor-1 (a. The American Cancer Society medical and editorial content team. Thyroid. Besirbellioglu BA, Ulcay A, Can M, et al. Echogenic foci E5X`>E#}Q)MgJ5/?f[O>LYz$/ 9ovKdrr"xl)%. Perri F, et al. False-negative fine-needle aspiration (FNA) biopsy results of thyroid nodules are of particular concern because they imply missed malignant lesions. /BaseFont /NOLLBA+Univers-Black /BaseFont /NOLLBE+Univers-CondensedBold Thyroid nodules are less common in children. Sonographic appearances of hobnail papillary thyroid carcinoma: A case report of a rare tumour. Gonzlez-Gonzlez A, Mate-Valdezate A, Parra-Arroyo A, Tenas-Burillo JM. By using our website, you consent to our use of cookies. However, its still important to see your healthcare provider if you notice a lump on your thyroid (in the front of your neck). According to the American Thyroid Association, roughly half of the population will have a thyroid nodule by age 60. 0000050067 00000 n Because of the risk, you should h Internal Medicine - Hematology & Oncology, It all depends on the size and if it is new. Find more COVID-19 testing locations on Maryland.gov. Hoang JK, et al. If you want to put a plan together to support your thyroid health, consider taking my thyroid course or reach out to us at the Ruscio Institute. 2022 Jun;279(6):3139-3146. doi: 10.1007/s00405-021-07151-3. Even though thyroid nodules are almost always noncancerous (benign), the small chance that it could be cancer means that most thyroid nodules need some type of evaluation. Solid hypoechoic nodule on isthmus THYROID ISTHMUS: Measures 0.52 cm. In rare cases, nodules can grow big enough to cause the following symptoms: Hyperfunctioning thyroid nodules can lead to overproduction of thyroid hormones, also known as hyperthyroidism. /CharSet (/O/R/I/G/N/A/L/E/S/C/H) Accessed Nov. 4, 2019. >}lB=C6 "vn(' ~ymuVaI>&{3r`F On average, 1 case of thyroid cancer was found for every 111 ultrasound exams performed. He or she will also check for signs and symptoms of hypothyroidism, such as a slow heartbeat, dry skin and facial swelling. High TSH and pregnancy can be a worrying combination, but hormone treatments are safe and effective. Advertising on our site helps support our mission. 2018; doi:10.3322/caac.21447. All rights reserved. Because of the high prevalence of malignancy in thyroid nodules that are large (3 cm or larger), cystic/solid, or large and cystic/solid and the high false-negative rate of FNA in diagnosing these lesions, thyroid lobectomy for diagnosis should be strongly considered in these patients even when FNA cytologic finding is interpreted as benign. `Cw_{^ See below for individual systems. 0 /LastChar 121 Your healthcare provider may order any of the following tests to help diagnose and evaluate a thyroid nodule: Treatment depends on the type of thyroid nodule. MATERIALS AND METHODS: Patients who underwent MWA at the Affil Tests include: Physical exam. Large, cystic/solid, and thyroid nodules with both characteristics had false-negative rates of 17%, 25%, and 30%, respectively, compared with 0%, 9%, and 17% for small (less than 3 cm), solid, and solid nodules 3 cm or larger, respectively. KMz?4\;bU&Lw0@Id~{Tca /Z{*L%46 MC&Z1 =8 ]:FQXFFwQ!#Bj, PH2YrLV Results: To rule out cancer and the need for a thyroidectomy, physical examination, thyroid scans, radioactive iodine uptake testing, fine-needle aspiration biopsy (FNA), or thyroid ultrasound may be used. Accessed Oct. 31, 2019. Our website services, content, and products are for informational purposes only. is this high chance of malignant? AJR Am J Roentgenol. Unable to load your collection due to an error, Unable to load your delegates due to an error. doi: 10.1001/jamainternmed.2013.9245. Epub 2021 Aug 23. Cavallo A, Johnson DN, White MG, Siddiqui S, Antic T, Mathew M, Grogan RH, Angelos P, Kaplan EL, Cipriani NA. Complex endobj /Prev 343972 We now have more research than ever before on the oral microbiome and how it affects total body health, including the gut. 2005;21(3):157-65. This usually means having a physical exam and thyroid function tests at regular intervals. Even though most thyroid nodules arent cancer, they can sometimes be a sign of and/or cause thyroid disease. http://www.thyroid.org/thyroid-nodules/. >> /Flags 262176 @'WUsUi: lc.e&o[lvqfj ^#y-j^ho:J[}>Et#e'l7ipK5Gi?AG1(-aXy|Qo`E5cScJ?3`f9zp?=D1-8o|iW)"# f OdOf~KuAkE'd8~ If a biopsy shows that you have a noncancerous thyroid nodule, your doctor may suggest simply watching your condition. 500 500 500 500 278 500 500 278 278 500 278 722 500 500 500 500 333 444 278 Studies have shown that people who take oral birth control and/or statins may have a reduced risk of developing thyroid nodules. /ExtGState << /GS2 84 0 R >> /FontName /NOLLBE+Univers-CondensedBold If small nodules are less than 1 cm or filled with fluid, they are almost always benign. A common treatment for cancerous nodules is surgical removal. 0000001713 00000 n The purpose of this study was to identify characteristics of thyroid nodules that may lead to false-negative cytologic interpretation after FNA. 0000009119 00000 n This article is based on scientific evidence, written by experts and fact checked by experts. Atypical celiac disease as cause of increased need for thyroxine: a systematic study. Parathyroid adenomas are also confounding nodules. It produces the hormones thyroxine (also called T4) and triiodothyronine (also called T3). HTQmL[euR@+:6AT&&D5M} dCpe,A2gdXvn95ysN<4G4-2]r 'hA/]88d*O-w6l {ly4ZZKrfsy^g'Z67o=.dp5N+_ms8=-OWfHkt6fq ESZOQ(*3(-MT" OQ#,7q"ML Ra-YYd@ue$31E*C6lO28'f{l$6]rB5ivYLPiE:uOfJnqE?Tm|A5}[UKSrDA5f x;E%>!#a l' By making a few targeted diet and lifestyle changes, including focusing on your gut health and optimizing your iodine levels, you can likely reduce the size of your thyroid nodules (and your worry). It may also include an ultrasound. 0000020220 00000 n Accessed Oct. 31, 2019. The Effect of Gluten-Free Diet on Thyroid Autoimmunity in Drug-Nave Women with Hashimotos Thyroiditis: A Pilot Study. JAMA Otolaryngology Head & Neck Surgery. This site needs JavaScript to work properly. The https:// ensures that you are connecting to the 0000050932 00000 n government site. High-resolution ultrasonography (US) is commonly used to evaluate the thyroid gland, but US is frequently misperceived as unhelpful for identifying features that distinguish benign from malignant nodules. Federal government websites often end in .gov or .mil. Heres what you need to know about thyroid nodules and how concerned you should be if you develop one. 0000046197 00000 n Curious about high TSH levels and fertility? Muscle weakness is a common symptom of hyperthyroidism caused by hormonal imbalances. followup needed? In other cases, the nodules can get big enough to cause problems. WebThyroid nodules are very common, especially in the U.S. 0000037219 00000 n American Thyroid Association. 2. /FontBBox [ -83 -250 1000 969 ] Li W, Zhu Q, Jiang Y, Zhang Q, Meng Z, Sun J, Li J, Dai Q. Multiple (more than one nodule). Improving your gut health with an anti-inflammatory diet and probiotics, and optimizing your iodine levels, can often reduce the size of thyroid nodules. Cleveland Clinics Endocrinology & Metabolism Institute is committed to providing the highest quality healthcare for patients with diabetes, endocrine and metabolic disorders, and obesity. Find out what is holistic dentistry and its approach to mercury fillings, fluoride, and improving oral health. and transmitted securely. Cystic thyroid nodules as detected by thyroid sonography and thyroid surgery are common. Thyroid nodules that had the highest probability of malignancy were those that were large (3 cm or larger), cystic/solid, or large and cystic/solid. lymph nodes with cystic change are highly suspicious; loss of normal fatty hilum, irregular node appearance; increased color Doppler flow is suspicious; no threshold >> Bookshelf 0000001569 00000 n No product order inquiries. 2015 Jan;22(1):152-7. doi: 10.1245/s10434-014-3952-7. Anyone can have a thyroid nodule, including children and adults. MLKAu >i?=w[pSwBwT-f~).^6o@*evP Some studies suggest that more than 50 percent of the population may have a thyroid nodule. Anti-Cancer Drugs. Disclaimer: (1) The information provided on this website is for educational purposes only and is not intended to diagnose or treat any disease. (https://www.thyroid.org/thyroid-nodules-children-adolescents/), (https://www.niddk.nih.gov/health-information/diagnostic-tests/thyroid), (http://www.womenshealth.gov/publications/our-publications/fact-sheet/thyroid-disease.html), (https://www.ncbi.nlm.nih.gov/books/NBK535422/), Visitation, mask requirements and COVID-19 information. In fact, experts estimate that about half of Americans will have one by the time theyre 60 years old. More than 90% of detected nodules in adults are noncancerous /OpenAction [ 41 0 R /Fit ] Comparison of diagnostic accuracy and utility of artificial intelligence-optimized ACR TI-RADS and original ACR TI-RADS: a multi-center validation study based on 2061 thyroid nodules. [16] For more about how to use probiotics, see our Probiotics Starter Guide. Risks of thyroid surgery include damage to the nerve that controls your vocal cords and damage to your parathyroid glands four tiny glands located on the back of your thyroid that help control your body's levels of minerals, such as calcium. WHAT ARE THE IMPLICATIONS OF THIS STUDY? A thyroid fine needle aspiration biopsy can collect samples of cells from the nodule, which, under a microscope, can provide your doctor with more information about the behavior of the nodule. But your doctor will also want to know if your thyroid is functioning properly. Korean J Radiol. The echogenicity of the nodule was compared with that of the surrounding parenchyma and was classified as hypoechogenic, isoechogenic, or hyperechogenic. This content does not have an English version. J Ultrasound Med. The changing incidence of thyroid cancer. 2017 May;27(5):641-650. doi: 10.1089/thy.2016.0336. Conclusions: If a thyroid nodule is causing voice or swallowing problems, your doctor may recommend treating it with surgery to remove all or part of the thyroid gland. A suspicious nodule (and lymph node, if applicable) should undergo biopsy with fine needle aspiration. At the time the article was created Matt A. Morgan had no recorded disclosures. 0000042480 00000 n When more than 50% of the nodule is solid and the solid portion of the nodule is eccentric, the risk of malignancy is greater. Ultrasound machines produce sound waves that penetrate your body, bouncing off tissues, bones, muscles, and other substances. You then lie on a table while a special camera produces an image of your thyroid on a computer screen. /Type /Page Some authors suggest that hypoechoic, solid nodules larger than 1 to 1.5 cm with macrocalcifications should be biopsied and spongiform nodules and cysts need no biopsy. Image-guided Thermal Ablation as a Promising Approach to Both 3. /Type /Font Aydoan B, Ceyhan K, ahin M, orapolu D. Are Thyroid Nodules with Spongiform Morphology Always Benign? 0000020734 00000 n endstream Nodules that produce excess thyroid hormone called hot nodules show up on the scan because they take up more of the isotope than normal thyroid tissue does. Decrease in thyroid autoantibodies after eradication of Helicobacter pylori infection. Thyroid nodules. %PDF-1.4 /Widths [ 833 722 778 833 667 611 833 778 333 611 778 611 1000 833 833 722 Epub 2022 Sep 23. Epub 2022 Jun 10. 2022 Oct 20;12:1013410. doi: 10.3389/fonc.2022.1013410. In rare cases, they're cancerous. Accessed Nov. 4, 2019. If your entire thyroid is swollen enough to be visible, then its a goiter and may also require treatment. For this reason, you should see your healthcare provider so they can evaluate the nodule to be sure its benign. That said, there are three main reasons to pay closer attention to a thyroid nodule: Well discuss each of these possibilities. 2016 Jan;154(1):46-51. doi: 10.1177/0194599815605326. /Parent 35 0 R WebThyroid nodules are classified as: Solitary (a single nodule). Graves disease is an autoimmune disease that causes the thyroid gland to create too much thyroid hormone. Decrease in TSH levels after lactose restriction in Hashimotos thyroiditis patients with lactose intolerance. Yang J, Sun Y, Li X, Zhao Y, Han X, Chen G, Ding W, Li R, Wang J, Xiao F, Liu C, Xu S. Front Oncol. The way that these sounds bounce back to form an image is known as echogenicity. The risk of cancer increased with the size of nodule. National Institute of Diabetes and Digestive and Kidney Diseases. You're also likely to have another biopsy if the nodule grows larger. 8600 Rockville Pike A newer alternative that the doctor can use to treat benign nodules in an office setting is called radiofrequency ablation (RFA). Learn how we can help 5.2k views Reviewed >2 years ago Thank Dr. Heidi Fowler and 2 doctors agree Some are solid, and some We reviewed 90 consecutive patients who underwent preoperative FNA of thyroid nodules followed by thyroid surgery during a period of 27 months, including their clinical data, type and size of thyroid nodule, FNA cytology results, and final pathology report of the surgical specimen. Thyroid nodules were found in 97% of patients with thyroid cancer and in 56% of without thyroid cancer. The majority of thyroid nodules are benign, dont cause symptoms, and dont require surgery. Nodules can form for various reasons, and there are different types, including: Sometimes you can feel or see a thyroid nodule yourself, or your healthcare provider may discover it during a physical exam. I have a right thyroid nodule that is well-circumscribed isoechoic solid nodule with a thin hypoechoic halo and small cystic space 1.71x1.53x1.19cm volume:1.6cc previous was 1.05x1.05x0.78cm vol:0.45cc after 3 yrs. CA: A Cancer Journal for Clinicians. Theyre common, almost always noncancerous (benign) and usually don't cause symptoms. Sonographic Differentiation of The object of this study was to evaluate the frequency of malignancy in mixed echoic thyroid nodules and ascertain the ultrasound findings that help distinguish benign from malignant nodules. 0000046515 00000 n 2014;203(6):1310-6. 80 0 R >> << Thyroid Adv Surg. Your doctor may recommend a thyroid scan to help evaluate thyroid nodules. Thyroid nodules. WebOBJECTIVE: Our research sought to investigate the relationship between initial ablation ratio (IAR) and internal composition of benign thyroid nodules treated by microwave ablation (MWA). Autopsy studies reveal the presence of thyroid nodules in 50% of the There are few studies regarding the reliability of ultrasonographic criteria for evaluating solid nodules as they apply to mixed echoic nodules. << Accuracy of fine needle aspiration in the pre-operative diagnosis of thyroid neoplasia. 500 444 778 500 444 ] 0000002322 00000 n FOIA Thyroid nodules are detected by ultrasonography in up to 68% of healthy patients. /E 53272 If you use iodized table salt, youre likely consuming enough. /CapHeight 722 Thyroid cancer: http://www.thyroid.org/cancer-of-the-thyroid-gland, Thyroid Nodules: http://www.thyroid.org/what-are-thyroid-nodules, Table of Contents | PDF File for Saving and Printing.