Anorectal malignant melanomas: Retrospective experience with surgical management

Table 1 Clinical pathologic factors and prognosis-related factors of 56 cases of anorectal melanoma

Factors	Cases	5-yr survival (%)	P value
Gender			0.759
Male	22	23.4
Female	34	18.1
Age (yr)			0.524
≤ 45	14	16.7
> 45	42	21.1
Tumor size (cm)			0.815
≤ 2	17	19.9
> 2	29	22.2
Lesion			0.001
Single	50	22.4
Multiple	6	0.0
Pigment			0.245
Yes	43	17.4
No	4	33.33
Depth of invasion			0.002
T1	10	62.5
T2	6	50.0
T3	19	12.5
T4	7	0.0
Lymph metastasis			0.275
Yes	21	20.6
No	15	30.0
Surgical method			0.645
Abdominoperineal resection	36	24.6
Local excision	20	9.9
Postoperative chemotherapy			0.256
Yes	19	17.8
No	15	0.0