A Manhattan appellate court has dismissed a legal malpractice suit on behalf of an elderly man who claimed his lawyers misled him into signing away control of his estate, but a dissenting judge said the majority’s decision “risks undermining the confidence of the public in the profession.”

Jack E. Maurer, who died last year at age 86, sued the firm formerly known as Goodkind Labaton Rudoff & Sucharow in 2003 for allegedly failing to explain to him the import of estate planning documents he signed. He also claimed the firm was conflicted because it represented his wife Rona, who he named as a co-defendant in the suit.