Oral Cancer Awareness and Knowledge in the City of Valongo, Portugal

Table 4

Mostly mentioned early manifestations of oral cancer.

Signs and symptoms	𝑛	%
Sore (ulcer) that does not heal	542	90
Lump or tissue overgrow	541	89.9
Difficulty in swallowing	390	64.8
Hemorrhage	370	61.5
Abscess, boil, or infection	359	59.6
Difficulty in open the mouth	338	56.1
Persistent white or red patch	318	52.8
Gastric pain	250	41.5
Prosthesis that fails to fit	201	33.4
Having aphthae very often	163	27.1