In most cases pineal TRb develops before the age of 5, but after the diagnosis of retinoblastoma; non-pineal TRb, however, is often diagnosed simultaneous with retinoblastoma.
Pineal TRb develops before the age of 5. This is in most cases.; non-pineal TRb is often diagnosed simultaneous with retinoblastoma. This was after the diagnosis of retinoblastoma. This was however.