Let g(f), S(f), g
λ(f) be the Littlewood-Paley g function, Lusin area function, and Littlewood-Paley g
λ(f) function of f, respectively. In 1990 Chen Jiecheng and Wang Silei showed that if, for a BMO function f, one of the above functions is finite for a single point in ℝn, then it is finite a.e. on ℝn, and BMO boundedness holds. Recently, Sun Yongzhong extended this result to the case of Campanato spaces (i.e. Morrey spaces, BMO, and Lipschitz spaces). One of us improved his g*
λ(f) result further, and treated parametrized Marcinkiewicz functions with Lipschitz kernel μρ(f), μρ
s(f) and μλ
*,ρ(f). In this paper, we show that the same results hold also in the case of rough kernel satisfying Lp
-Dini type condition.