What are signs of throat cancer?

Hoarseness, etc. Hoarseness, a lump in the throat, throat pain, weight loss, blood in the sputum are possible signs of throat cancer, though these signs may be caused by other problems.
Hoarse and others. Throat cancer (usually due to smoking) can cause various sign/symptoms depending on the exact location. If the primary tumor is on or near vocal cords then hoarseness is a symptom. I have had patients with 'back of the tongue' cancer or 'tonsil cancer' and these just caused 'pain' in the area. Also a late finding of 'head/neck cancer' is enlarged lymph nodes in the neck. An ENT md is best to see.