A man's body was left decomposing on a mortuary table for six days.
David Gardner, 59, from Tetbury, was admitted to Gloucestershire Royal Hospital suffering from a diseased kidney and liver. He died on 1 March.
His family claim his body was too big to fit in a mortuary fridge so was left unrefrigerated on a table. A plan for an open casket funeral was scrapped because his body was too decayed.
A hospital spokesman said an investigation had begun.
Mr Gardner's wife Elsie said the family had wanted to say goodbye to him in an open casket but could not because his body was too badly decomposed.
She said: "He was the only man that I loved. He was the only man that loved me.
"How can I let him go when I can't say goodbye? It's just wrong."
The funeral will take place next Tuesday.
A spokesman for Gloucestershire Hospitals NHS Foundation Trust said: "We are working alongside Mr Gardner's family, our bereavement team and our staff to investigate their concerns and establish what happened on this occasion."