Although it is conceded that claimant's decedent died as a result of the disease lymphonatoid granulomatosis, which affects the lungs as well as the skin and central nervous system, the Workers' Compensation Board was faced with conflicting expert medical opinions as to whether the disease was related to decedent's exposure to toxic chemicals and fumes at work. "Questions of credibility, reasonableness and weight of medical evidence are for the [B]oard to decide" (Matter of Adler v Guild Elecs., 97 A.D.2d 606). Here, although claimant's experts determined that the disease was directly related to decedent's occupation, both the employer's experts and the impartial specialist found no such causal relationship. Under the circumstances, the Board's resolution of the factual issues created by the conflicting medical proof against claimant was supported by substantial evidence (see, supra; see also, Matter of De Maio v Rockford Plumbing Heating, 63 A.D.2d 1041, affd 48 N.Y.2d 665).
Decision affirmed, without costs. Weiss, J.P., Mikoll, Levine, Mercure and Harvey, JJ., concur.