Muscle atrophy in chronic inflammatory demyelinating polyneuropathy: a computed tomography assessment

Area of Science:

• Neurology
• Clinical Medicine
• Pathophysiology

Background:

• Muscle atrophy in chronic inflammatory demyelinating polyneuropathy (CIDP) is typically considered mild.
• The extent and characteristics of muscle atrophy in CIDP require further investigation.

Purpose of the Study:

• To evaluate the presence and extent of muscle atrophy in patients with CIDP using computed tomography (CT).
• To compare clinicopathological findings between CIDP patients with and without muscle atrophy.
• To assess the impact of muscle atrophy on functional prognosis in CIDP patients.

Main Methods:

• Thirty-one patients with definite CIDP were assessed.
• Computed tomography (CT) was used to identify and quantify muscle atrophy.
• Clinicopathological data, including nerve conduction studies and sural nerve biopsies, were compared between groups.

Main Results:

• Marked muscle atrophy with fatty degeneration was observed in 11 of 31 CIDP patients via CT.
• Muscle atrophy predominantly affected lower extremities, particularly ankle plantarflexors.
• Patients with muscle atrophy showed more pronounced weakness in lower extremities and poorer functional prognoses after treatment.

Conclusions:

• Muscle atrophy is present in a significant subgroup of CIDP patients, even those with typical disease forms.
• CIDP patients with muscle atrophy tend to have predominant lower extremity motor impairments.
• The presence of muscle atrophy is associated with a poorer functional prognosis in CIDP.