Table 1.

Peritoneal Surface Disease Severity Score

Symptomatology	PCI	Histology
No symptoms (0)	< 10 (1)	Well differentiated or moderately differentiated + N0 (1)
Moderate symptoms (1)	10-20 (3)	Moderately differentiated + N1 or N2 (3)
Severe symptoms (6)	> 20 (7)	Poorly differentiated or ring seal (9)

(): Score. Moderate symptoms is defined as weight loss of < 10%, moderate abdominal pain, ascites asymptomatic. Severe symptomatology is defined as weight loss of > 10%, pain that continues, intestinal obstruction, symptomatic ascites. PCI: Peritoneal Cancer Index (0-39). Histology of the primary tumor. N regional lymph node metastasis. Grade I: Summation result = (2-3); Grade II: (4-7); Grade III: 8-10; Grade IV: > 10.