Singer Melissa Etheridge (search) has been diagnosed with breast cancer and has canceled upcoming tour dates to undergo treatment, her publicist said Thursday.

Etheridge, 43, will undergo surgery and a "speedy and complete recovery" is expected by her doctor, publicist Marcel Pariseau said in a statement.

The cancer was detected early and Etheridge has been receiving treatment, Pariseau said.

"I am fortunate to be under a wonderful doctor's care and thankful that this was caught early," Etheridge said in the statement. "I am looking forward to a quick and full recovery."

Etheridge and actress Tammy Lynn Michaels (search) held a commitment ceremony in September 2003. The musician, who lives in Los Angeles, shares custody of a daughter and son with former partner Julie Cypher, who had the children through artificial insemination using a sperm donation from rocker David Crosby (search).

Etheridge's latest album, "Lucky," was released in February. Refunds for tickets to her upcoming shows will be available where they were bought; the entertainer's Web site says she had been scheduled to play 11 dates in seven cities this month.