Objective: To explore the characteristics of the sublingual venae in patients with primary liver cancer (PLC).
Methods: The shape, color and the red, green and blue values of the sublingual venae were analyzed quantitatively for PLC patients in different clinical stages by analysis system for comprehensive information of tongue diagnosis.
Results: With the aggravating of the disease, the patients' sublingual venae became wide and tortuous, and their color became blue and purple. The abnormality of the sublingual venae was more serious in clinical stage III than in stages I and II (P < 0.05).
Conclusion: The shape, color and abnormality degree of the sublingual venae in patients with PLC in different clinical stages are distinct.