Michael Strahan came on his own show to share that his daughter was recently on the verge of brain cancer ... and it answers a lot about his on-air presence (or lack thereof) lately.
The ex-NFL'er/current 'GMA' host sat for a segment on the ABC program Thursday opposite his coworker Robin Roberts -- where he and his 19-year-old, Isabella, revealed she'd been receiving treatment lately for a malignant tumor found in her head dating back to October.
The cancer is known as medulloblastoma -- and in the package they aired .