The upcoming consistory’s 22-name list will not be complete on the 18th of this month. One of the 22 new cardinals won’t be travelling down to Rome for reasons of ill health. Father Karl Josef Becker, the 83-year-old German theologian and consultor for the Congregation for the Doctrine of the Faith, will be created a cardinal at a private ceremony at some later date.
Father Becker has long been a confidante of Pope Benedict XVi, from back when the latter, as Cardinal Ratzinger, was prefect of the Congregation for the Doctrine of the Faith. Fr. Becker also participated in the negotiations with the SSPX about their return to Rome.
As a Jesuit priest he will most likely also request dispensation from being consecrated a bishop before his elevation to cardinal. Of the three future cardinals who are not bishops yet – Fr. Becker, Fr. Julien Ries and Fr. Prosper Grech – only the latter will be consecrated a bishop, and appointed as titular Archbishop of San Leone. This will take place on 8 February. The exact nature of Fr. Becker’s health concerns have not been revealed.
Source: Radio Vatikan.
In Caelo et in Terra 
Ah! I’ve been told many times that one needn’t be a bishop to be created a cardinal. However, this is the first time I hear about actual live non-bishop cardinals.
Father Ries will also be consecrated a bishop http://www2.fiu.edu/~mirandas/bios2012.htm#Ries