Human myiasis in anal carcinomatous ulcer--a case report.

A 65-year-old male having a painless ulcer in the perianal region for last 11 months reported with severe pain in the ulcer for last 5 days and found that worms were crawling out of the ulcer since two days. He was diagnosed as a case of squamous cell carcinoma of the perianal region with human myiasis. The treatment consisted of manual removal of the larvae by topical application of turpentine oil, oral therapy with antibiotics and surgical excision of the ulcerative growth.