Andrew McMahon, lead singer of the pop/rock acts Something Corporate and Jack’s Mannequin, has been diagnosed with acute lymphatic leukemia. Treatment of his condition, from which his doctors believ

Andrew McMahon, lead singer of the pop/rock acts Something Corporate and Jack’s Mannequin, has been diagnosed with acute lymphatic leukemia. Treatment of his condition, from which his doctors believe he will fully recover, according to a statement, necessitates the cancellation of the upcoming tour plans for both bands.

Jack's Mannequin has been on the road for a few weeks and has dates scheduled through a June 13 stop in Dallas. Announcing a cancellation last week prior to his diagnosis, McMahon took to the band's official Web site to express his guilt about not being able to play the gig.

"I have sung five shows now with an unrelenting case of laryngitis and finally spoke with my doctor this morning," he wrote on May 25. "He fears if I continue to sing without resting that I could do permanent damage to my voice.

"It has been a source of pride for me that I have never cancelled a show for voice troubles," he added. "Today is one of the hardest days of my entire touring career."

After the Jack's Mannequin dates, Something Corporate was due to play a couple of mid-summer festivals before joining the Vans Warped Tour for a 13-show run across the first half of August.

Despite the cancellation of the tours and his treatment, McMahon has insisted that the planned release of the debut Jack’s Mannequin album, "Everything in Transit," due in August from Maverick Records, goes ahead as scheduled.

Something Corporate has released two albums. "Leaving Thru the Window" (Drive-Thru/MCA) bowed at No. 1 on Billboard's Heatseekers chart in 2002. Its follow-up, "North" (Drive-Thru/Geffen) bowed at No. 24 on The Billboard 200. The albums have sold 291,000 and 339,000 in the United States, respectively, according to Nielsen SoundScan.

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