New Delhi, Oct. 20 -- In March 2023, when Hailey Robb was eight months pregnant with her third child, life seemed to be unfolding as expected - until one small detail disrupted everything.

While giving her two-year-old son, Carter, a bath, Hailey felt something unexpected near his left ribs - a small, firm "knot." That same week, her husband, Austin, mentioned noticing it too while playfully tickling their son.

"My husband noticed it while tickling him. I noticed it while giving him a bath," Hailey recounted. "We must've both noticed it around the same time and it came up in conversation soon after I noticed it."

Ordinarily, Hailey was the worrier of the pair, so when Austin brought it up first, she knew it wasn't trivial. A few days l...