A Case Report of Prolonged Survival of Anorectal Melanoma.

Malignant Melanoma of the Anorectum: Report of Four Cases

“…8 However, this has not yet been confirmed in anorectal melanoma because it is a rare tumor. Hara et al 9 reported that the 5-year survival rate was more than 30% in patients who underwent APR, and had a tumor measuring less than 50 mm in diameter or the disease limited to the depth of the muscularis propria. Therefore, the staging system and the treatments should be established based on the tumor size or thickness, as with cutaneous melanomas.…”

A case report of anorectal malignant melanoma with mucosal skipped lesion

“…The presence or absence of lymphatic metastasis has not demonstrated any significant difference in prognosis. The conditions for ensured long-term survival are: 1) maximum tumor diameter <5 cm, 2) wall invasion depth within the muscularis propria, and 3) extensive lymph node dissection regardless of the presence or absence of lymphatic metastasis [8] . In Japan, few studies have assessed the long-term survival of patients who have undergone local excision.…”

Seven-year survivor with malignant melanoma of the anus without radical surgery

“…3'8 Hara et al also reported that 9 Japanese long-term survivors were all treated with abdominoperineal resection, and that in 8 of these patients with available pathologic records, tumors were less than 5 cm in size and the depth of invasion was limited to the muscularis propria. 4 The patient we are describing had a tumor measuring 2 cm in diameter, and tumor depth was within the submucosa. She survived for 7 years and 10 months after local excision.…”

“…3 Hara et al reported that all nine 5-year survivors in Japan were treated with abdominoperineal resection. 4 We report on a Japanese patient with malignant melaReceived Mar. 25, 1996; revised Oct. 3,1996; accepted for publication in revised form Nov. 22, 1996.…”