A 68-year-old female complains of feeling tired all the
time and also complains of breathlessness on exertion.
She has had radiotherapy for carcinoma of the cervix in
Investigations reveal iron deficiency anaemia.
She has an upper GI endoscopy and distal duodenal biopsy.
Histology from the duodenal biopsy is reported as showing villous atrophy,
crypt hyperplasia, increase in number of intraepithelial lymphocytes,
infiltration of plasma cells and lymphocytes in the lamina propria.
In this patient which of the following is the likely