Differential Diagnosis
Two months later, the patient presented with the same symptoms and
required another hospital admission for IV thyroxine due to a suspicion
of decreased oral levothyroxine absorption. A duodenal biopsy was taken,
which has shown no evidence of H. pylori, celiac disease, or any form of
dysplasia or malignancy. During that time, the patient had not taken any
over-the-counter medications and confirmed compliance with the
prescribed medications.