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Inicio Endocrinología, Diabetes y Nutrición (English ed.) Posthemithyroidectomy hypothyroidism. Prevalence and predictive markers. Compari...
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Original article
Available online 5 August 2024
Posthemithyroidectomy hypothyroidism. Prevalence and predictive markers. Comparison between patients with euthyroid and hyperthyroid nodular goitre
Hipotiroidismo posthemitiroidectomía. Prevalencia y marcadores predictivos. Comparación entre pacientes con bocio nodular eutiroideo e hipertiroideo
Luis García Pascuala,
Corresponding author
23566LGP@comb.cat

Corresponding author.
, Carlos Puig-Jovéa, Andreu Simó-Servata, Lluís García-Gonzálezb
a Servei d’Endocrinologia, Hospital Universitari Mútua de Terrasa, Terrassa, Barcelona, Spain
b Servei de Cirurgia General i Aparell Digestiu, Hospital Universitari Arnau de Vilanova, Lleida, Spain
Received 22 March 2024. Accepted 02 May 2024
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Tables (6)
Table 1. Comparison of preoperative variables for PHH onset in hemithyroidectomized patients based on preoperative euthyroid or hyperthyroid status.
Table 2. Characteristics of PHH according to preoperative euthyroid or hyperthyroid status.
Table 3. Predictive markers of PHH based on preoperative euthyroid or hyperthyroid status.
Table 4. Variables independently associated with PHH onset in the binary logistic regression model based on preoperative euthyroid or hyperthyroid status.
Table 5. Variables with predictive power for PHH and characteristics associated with cutoffs based on preoperative euthyroid or hyperthyroid statusa.
Table 6. Prevalence of PHH in series of patients with toxic thyroid nodules undergoing surgery.
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Abstract
Background and objective

Posthemithyroidectomy hypothyroidism (PHH) is a relatively common complication (22%–30%) for which we have no published information from our country. The objective of the study is to determine the prevalence of PHH and evaluate its predictive markers by comparing patients who had euthyroidism with those who had hyperthyroidism before hemithyroidectomy.

Patients and method

Retrospective observational cross-sectional study on 106 patients, 88 euthyroid before hemithyroidectomy and 18 hyperthyroid.

Results

Prevalence of PHH in euthyroid patients 42% (89.2% subclinical hypothyroidism; 10.8% manifest hypothyroidism) and in hyperthyroid patients 50% (77.8% subclinical hypothyroidism; 22.2% manifest hypothyroidism). Predictive markers in euthyroid patients: preoperative thyrotropin ≥ 2.2 mIU/L (OR: 4.278, 95% CI: 1.689−10.833; sensitivity: 54.1%, 95% CI: 38%–70.1%; specificity: 78.4%, 95% CI: 67.1%–89.7%), age ≥50 years (OR: 3.509, 95% CI: 1.438–8.563; sensitivity: 64.9%, 95% CI: 49.5%–80.3%; specificity: 64.7%, 95% CI: 51.6%–77.8%) and percentage of remainder lobe ≤ 19.6% (OR: 1.024, 95%: 1.002–1.046; sensitivity: 70.2%, 95% CI: 55.5%–84.9%; specificity: 48.6%, 95% CI: 34.9%–62.3%). Predictive marker in hyperthyroid patients: weight >70 kg (OR: 28, 95% CI: 2.067–379.247; sensitivity: 88.9%, 95% CI: 68.4%–100%; specificity: 88.9%, 95% CI: 68.4%–100%).

Conclusions

This is the first study in our country that demonstrates a prevalence of PHH above the average in euthyroid patients, which is slightly higher and more intense in hyperthyroid patients, and that recognizes the classic predictive markers in euthyroid patients but highlights a novel predictive marker marker in hyperthyroid patients, useful to assess a different risk of PHH when indicating hemithyroidectomy and to establish closer control of postoperative hormonal evolution.

Keywords:
Hemithyroidectomy
Hypothyroidism
Postoperative hypothyroidism
Resumen
Antecedentes y objetivo

El hipotiroidismo posthemitiroidectomía (HPH) es una complicación relativamente frecuente (22%–30%) de la que no tenemos información publicada de nuestro país. El objetivo del estudio es determinar la prevalencia del HPH y evaluar sus marcadores predictivos comparando los pacientes eutiroideos con los que tuvieron hipertiroidismo antes de la hemitiroidectomía.

Pacientes y método

Estudio retrospectivo observacional transversal sobre 106 pacientes, 88 eutiroideos antes de la hemitiroidectomía y 18 hipertiroideos.

Resultados

Prevalencia de HPH en los pacientes eutiroideos 42% (89,2% hipotiroidismo subclínico; 10,8% hipotiroidismo manifiesto) y en los hipertiroideos 50% (77,8% hipotiroidismo subclínico; 22,2% hipotiroidismo manifiesto). Marcadores predictivos en los pacientes eutiroideos: tirotropina preoperatoria ≥ 2,2 mUI/L (OR: 4,278, IC al 95%: 1,689–10,833; sensibilidad: 54,1%, IC al 95%: 38%–70,1%; especificidad: 78,4%, IC al 95%: 67,1%–89,7%), edad ≥ 50 años (OR: 3,509, IC al 95%: 1,438–8,563; sensibilidad: 64,9%, IC al 95%: 49,5%–80,3%; especificidad: 64,7%, IC al 95%: 51,6%–77,8%) y porcentaje del lóbulo remanente ≤ 19,6% (OR: 1,024, IC al 95%: 1,002–1,046; sensibilidad: 70,2%, IC al 95%: 55,5%–84,9%; especificidad: 48,6%, IC al 95%: 34,9%–62,3%). Marcador predictivo en los pacientes hipertiroideos: peso >70 kg (OR: 28, IC al 95%: 2,067–379,247; sensibilidad: 88,9%, IC al 95%: 68,4%–100%; especificidad: 88,9%, IC al 95%: 68,4%–100%).

Conclusiones

Es el primer estudio en nuestro país que demuestra una prevalencia del HPH por encima de la media en los pacientes eutiroideos, que resulta ligeramente superior y más intenso en los hipertiroideos, y que reconoce los clásicos marcadores predictivos en los pacientes eutiroideos pero destaca un marcador predictivo novedoso en los pacientes hipertiroideos, útil para valorar un riesgo diferente de HPH al indicar la hemitiroidectomía y para establecer un control más estrecho de la evolución hormonal postoperatoria.

Palabras clave:
Hemitiroidectomía
Hipotiroidismo
Hipotiroidismo postoperatorio

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