Endocrine oncology

Tracking dynamic evolution of low‐ and intermediate‐risk differentiated thyroid cancer: Identification of individuals at risk of recurrence

Clin Endocrinol (Oxf)Published Retrospective cohort study

Authors' conclusion

Patients with DTC classified as low- or intermediate-risk of recurrence with excellent response to treatment at FU1 rarely develop structural disease and this occurs almost exclusively in the first 5 years. Initial DRS status is an accurate tool for determining the risk of recurrence.

Study context

Population
Low- or intermediate-risk differentiated thyroid cancer (DTC) patients; mean follow-up 8.2 ± 6.2 years
Participants
299 participants
Exposure
Response to treatment at FU1 by American Thyroid Association (ATA) dynamic risk stratification (DRS) category
  • Excellentn = 181
  • Indeterminaten = 81
  • Biochemical incompleten = 26
Outcome
Structural recurrence
Methodological detailsATA dynamic risk stratification
  • ATA dynamic risk stratification

Main finding

As reported in the abstract

Structural recurrence by DRS at FU1 · mean follow-up 8.2 ± 6.2 years

Observational data: associations, not effects.

Further findings

Risk factors of recurrence: excellent, indeterminate and biochemical incomplete vs structural incomplete response at end of follow-up

Univariate: tumour size
P < 0.001
Univariate: T status
<0.001
Univariate: positive lymph nodes (N)
P < 0.01
Univariate: multifocality
P < 0.004
Univariate: need of additional radioactive iodine (RAI)
P < 0.0001
Univariate: first DRS status
P < 0.0003
Multivariate: only RAI remained significant
P < 0.02

Risk factors of recurrence: excellent and indeterminate vs biochemical and structural incomplete responses

Tumour size
P < 0.0004
T
P < 0.01
N
P < 0.0001
Bilaterality
P < 0.03
First DRS status
P < 0.0001
RAI
P < 0.001
Multivariate: T confirmed
P < 0.01
Multivariate: first DRS confirmed
P < 0.0006

Original publication

Tracking dynamic evolution of low‐ and intermediate‐risk differentiated thyroid cancer: Identification of individuals at risk of recurrence. Clin Endocrinol (Oxf). Published 22 July 2024. doi:10.1111/cen.15111

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