Treating lymphoedema early after head and neck radiotherapy was linked to better swallowing

Design

Retrospective cohort within a standardised care pathway

Population

110 patients with internal lymphoedema 3 months after head and neck RT or CRT

Primary outcome

Swallowing physiology (DIGEST) and patient-reported scores at 15 months

Effect

DIGEST favoured treatment (p < 0.001); EAT-10 −3.63 vs +1.13 (p = 0.001)

Internal lymphoedema of the pharynx and larynx is common after radiotherapy or chemoradiotherapy for head and neck cancer, and it can progress to fibrosis. A Laryngoscope study reviewed 110 patients in a standardised care pathway, all found to have internal lymphoedema at three months and all advised to have treatment.

Seventy-two completed treatment with an advanced pneumatic compression device or manual lymphatic drainage; 38 did not. At 15 months, treated patients had more favourable instrumental swallowing measures for overall severity, safety and efficiency (all p < 0.001). Patient-reported scores moved in opposite directions: EAT-10 improved by 3.63 points with treatment and worsened by 1.13 without; the Reflux Symptom Index improved by 5.21 against a 2.55 worsening. Mouth opening and cancer recurrence did not differ. The associations held after adjustment.

The groups chose for themselves whether to complete treatment, so motivated patients may simply do better. Still, the signal supports routine lymphoedema surveillance at three months and early referral to a lymphoedema-trained therapist.

• Assess for internal and external lymphoedema at the three-month review after head and neck radiotherapy.
• Refer patients with lymphoedema early to a lymphoedema-trained therapist for manual drainage or compression.
• Track swallowing with a patient-reported tool such as EAT-10 at follow-up visits.
• Mouth opening did not improve with lymphoedema treatment, so trismus needs its own management.

Why it matters

A treatable cause of long-term swallowing decline is often left until fibrosis has set in.

Don't overread it

Patients chose whether to complete treatment, so this retrospective study cannot show the treatment caused the improvement.

The statistics, in plain English

An EAT-10 difference of about 4.8 points between groups is meaningful on a 40-point scale. Because treatment was not randomised, part of the difference may reflect who chose to complete it.

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