Is thyroid cancer genetic?

Perhaps. Known genetic mutations are seen in thyroid cancers: braf in papillary; kras in follicular; ret gene (usually point mutation) involving 10q11.2 in medullary carcinoma; p53 in undifferentiated carcinoma. However, "inherited" types of thyroid carcinoma are much less common - although medullary carcinoma is the most common type.
Yes, sometimes. There are different types of thyroid cancer. One type, medullary thyroid cancer, is inherited 25% of the time due to a mutation of the ret gene. The other types of thyroid cancer are not inherited.
Genetic. Thyroid cancer can be genetic but is most often sporadic (random). Your doctor will send you for genetic valuation if he/she suspects its a hereditary issue.

Related Questions

What kind of thyroid cancer do I have?

Depends. There are 4 types of thyroid cancer: papillary, follicular/hurthle cell, medullary and anaplastic. Papillary is most common (75% of all thyroid cancer) so if you have thyroid cancer, this's probably what you have. Anaplastic is very aggressive and is deadly, so you most likely do not have this one. The only way to know is through a thyroid biopsy or surgery. Read more...
Can only know. By formal pathology report of biopsy or removal of the tumor/ thyroid gland. Read more...

What are the symptoms of thyroid cancer?

None early on... Thyroid cancer typically doesn't cause any signs or symptoms early in the disease. As thyroid cancers grow, they may cause a number of symptoms including: a lump that can be felt through the skin in the neck, changes in a person's voice (including increasing hoarseness), difficulty swallowing, pain in the neck / throat, and possibly enlarged lymph nodes in the neck. Hope that this helps. Read more...
Thyroid cancer sympt. Neck mass, hoarse voice, problems swallowing, and/or problems breathing are the chief symptoms. Read more...