Gastrointestinal Sensory Neuropathy and Dysmotility in Fabry Disease: Presentations and Effect on Patient's Quality of Life.

INTRODUCTION

Fabry disease is a rare multisystemic lysosomal disease resulting in variable manifestations of the gastrointestinal (GI), neurologic, cardiac, and renal systems. Whether GI manifestations are a result of gut dysmotility is undetermined. We aimed to explore GI manifestations in depth and their effect on patients with Fabry disease and to characterize gut motility.

METHODS

We recruited adult patients with Fabry disease reporting GI manifestations. All patients answered a battery of questionnaires covering symptom severity, GI-specific quality of life, and effects of work/productivity and underwent a wireless motility capsule test to measure pan-gut motility.

RESULTS

In 48 patients with Fabry disease, abnormal bowel habits and abdominal pain were the most common symptoms. Bloating, nausea, vomiting, and reflux were also prevalent. Neurologic manifestations were found in 95.8% of patients, along with their GI manifestations. Dysmotility was found in less than 35% of wireless motility capsule tests. Colon transit time was associated with constipation severity and Bristol Stool Scale. Several GI symptoms were associated with reduced quality of life, anxiety, and work/productivity, but not Fabry severity score.

DISCUSSION

This is the largest study of GI manifestations in patients with Fabry disease that characterizes gut motility. We found little association between GI manifestations and motility indices, suggesting that visceral hypersensitivity may be a major driver of symptoms. GI symptoms affect different aspects of patients' lives, yet are not always well-discussed or optimally managed in Fabry disease. Disease severity scores when used for therapeutic decision making do not often include GI symptoms or their impact.