Dina Lohan, 53, was first hospitalised on 24 June (16) after complaining of severe stomach pains, according to TMZ.com.

The pain spread to her back and neck, and staff at the undisclosed medical centre ran tests including MRIs and CAT scans, but are allegedly no closer to diagnosing the reality TV star's illness.

In a photo obtained by TMZ, Dina is pictured smiling for the camera as she sits in a hospital bed surrounded by medical equipment.

The mystery ailment caused Dina to miss Lindsay's 30th birthday celebrations in Greece on 2 July (16), and now it has been revealed the mother-of-three is still under doctors' care.

She was given antibiotics, and had a biopsy performed on a nodule on her throat, but is still in hospital.

A representative for the reality star has yet to comment on the report.