I have discovered that Quessenberry has been diagnosed specifically with T-cell lymphoblastic non-hodgkins lymphoma. T-cell as opposed to B-cell is quite uncommon (15% / 85% ratio), and T-cell generally carries a significantly poorer prognosis. The lymphoblastic variety makes up only 2%. In most cases, lymphoblastic lymphoma progresses to Stage IV prior to diagnosis. Tumors in this stage have spread to the bone marrow, spleen, and central nervous system. Chemotherapy, with or without radiation therapy, is the classic therapy, but bone marrow transplants have shown great response in appropriate cases, especially in cases of first time recurrences. As long as the disease is caught before significant bone marrow involvement is present, with intensive therapy, this particular T-cell variant the Quess has can sometimes be cured or placed in long term remission (~50%), even in stage 4.
Not knowing his disease's exact extent of involvement, I join in wishing Quess a complete recovery and a return to the Texans following his lengthy intensive treatments, and an adequate post-treatment rest and significant "rebuild" period.