Is it hard to tell if one got leukemia?

I have just one very simple question that I want to know regarding this disease: Are there symptoms so specific to leukemia? I was thinking, had they known, their son might have been with them longer..An article from the American Cancer Society confirmed my guess. None.

---

Qoute:

At least one-fifth of people with chronic leukemia have no symptoms at the time their cancer is diagnosed. Their cancer is diagnosed by blood tests performed during an evaluation some unrelated health problem or during a routine checkup. Even when symptoms are present, they are often vague and nonspecific. Most symptoms of chronic leukemia, such as weakness, fatigue, reduced exercise tolerance, weight loss, fever, bone pain and pain or a sense of "fullness" in the abdomen (especially after eating a small meal) can also occur with other cancers as well as many noncancerous conditions.

---

"...occur with...many noncancerous conditions." How true. Too bad. The symptoms are so ordinary one would mistake it for just an ordinary pain. Silent killer. Leukemia deserves that name.