Munster back row John Hodnett is facing eight-to-ten weeks on the sidelines following surgery on a finger injury.
Simon Zebo must see a specialist next week following a scan on a knee injury.
Scrum-half Paddy Patterson requires knee surgery, and his season is over.
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But Tom Ahern could feature in Saturday’s meeting with Super Rugby champions the Crusaders at Páirc Uí Chaoimh.
The forward is following the return to play protocols, and a call on his availability will be made later in the week.
