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PRİMER HİPERPARATİROİDiDE, PARATİROİD ADENOM AĞIRLIĞI İLE PREOPERATİF BİYOKİMYASAL PARAMETRELER ARASINDAKİ İLİŞKİ

RELATIONSHIP BETWEEN ADENOMAWEIGHT AND PREOPERATIVE BIOCHEMICAL PARAMETERS IN PRIMARY HYPERPARATHYROIDISM

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Abstract (2. Language): 
Objective:The aim of this study was to determine the relationships between parathyroid adenoma weight and preoperative biochemical indices such as parathyroid hormone, calcium, phosphate, alkaline phosphatase, and urinary calcium excretion in patients with primary hyperparathyroidism. Materials and methods: Forty five patients with primary hyperparathyroidism followed-up between the years 1996 and 2005 in our endocrinology clinic in whom the presence of parathyroid adenoma was histopathologically confirmed after the surgical excision were included in this retrospective study. Patients with high creatinin levels, multiple endocrine neoplasia syndrome, and with parathyroid cancer and those with parathyroid hyperplasia were exluded. The biochemical parameters in the patients were recorded and the relationship between parathyroid adenoma weight and those parameters was statistically analyzed using the Pearson bivariate correlation analysis.Results: The mean age of study group was 52.7 years. The preoperative laboratory evaluation revealed the following findings: Serum calcium concentrations (Ca): 11.8 ± 1.0 mg/dL (range:10.1-15.4; normal: 8.5-10.5); phosphate (P): 2.3 ± 0.51 mg/dL (range 1.2-3.5; normal: 2.7-4.5); alkaline phosphatase (ALP): 332.0 ± 199 U/L (range: 80-1143; normal:90-260); 25-hydroxy-vitamin D (25(OH)D3): 24.9 ± 23.5 ng/mL (range: 5-101; normal>20); parathyroid hormone (PTH): 376 ± 389 pg/mL (range: 65-1562; normal 10-65) and urinary calcium excretion: 523 ± 185 mg/24 h (range: 98-850; normal:<300). The mean weight of the excised parathyroid adenomas was 1098 ± 804 mg. A significant positive correlation was observed between parathyroid adenoma weight and serum calcium concentrations (r=0.33, p<0.05). Serum 25(OH)D3 concentrations correlated significantly and negatively with parathyroid adenoma weight (r=-0.46, p<0.01). PTH and ALP correlated significantly and negatively with 25(OH)D3 (r=-0.29, p<0.05 and r=-0.36, p<0.05 respectively). A significant positive correlation was observed between PTH and ALP(r=0.50, p=0.001). No significant correlations were observed between the adenoma weight and PTH, ALP, P, and urinary calcium excretion. Conclusion: Significant positive correlation between parathyroid adenoma weight and serum calcium concentrations observed in this study indicates that parathyroid adenoma weight may affect the clinical and laboratory presentation of the disease. Significant negative correlation between parathyroid adenoma weight and 25(OH)D3 concentrations indicates increased parathyroid tumor growth in vitamin D deficiency states leading to more severe forms of the disease besides well-known normocalcemic forms.
Abstract (Original Language): 
Amaç: Primer hiperparatiroidizmli hastalarda klinik belirti ve bulgular hastadan hastaya farkl›l›klar göstermektedir. Bu çal›flmada, paratiroid adenom a¤›rl›¤› ile ameliyat öncesi tespit edilen serum parathormon (iPTH), kalsiyum (Ca), fosfor (P), alkalen fosfataz (ALP), 25-hidroksivitamin D (25(OH)D3) ve üriner kalsiyum at›l›m› gibi biyokimyasal parametreler aras›nda iliflki olup olmad›¤›n›n tespiti amaçland›. Gereç ve yöntem: Bu retrospektiv araflt›rmada, endokrinoloji poliklini¤imizce 1996 – 2005 y›llar› aras›nda takip edilen, histopatolojik olarak paratiroid adenomu tan›s› do¤rulanm›fl 45 hasta çal›flmaya al›nd›. Yüksek kreatinin düzeyleri, multiple endokrin neoplazi sendromu, paratiroid karsinomu olanlar ve patolojik incelemede paratiroid hiperplazisi tespit edilenler çal›flmaya al›nmad›. Hastalar›n iPTH, Ca, ALP, 25(OH)D3 ve 24 saatlik üriner kalsiyum at›l›m› kaydedildi. Pearson ‘bivariate’ korelasyon analizi yöntemiyle istatistiksel analiz yap›ld›. Bulgular: Yafl ortalamas› 52,7 y›l (23-76) olan 45 hastan›n laboratuvar incelemelerinde; operasyon öncesi dönemde ortalama Ca:11,8 ± 1,0 mg/dL (aral›k:10,1-15,4; normal: 8,5-10,5), P: 2,3 ± 0,5 mg/dL (aral›k:1,2-3,5; normal: 2,7-4,5), ALP:332 ± 199 U/L (aral›k: 80-1143; normal:90-260), 25(OH)D3:24,9 ± 23,5 ng/mL (aral›k: 5-101; normal> 20), PTH: 376 ± 389 pg/mL (aral›k: 65-1562; normal 10-65) ve idrar kalsiyum at›l›m› 523 mg/24 saat (aral› k:98-850; normal:<300) olarak tespit edildi. Paratiroid adenomlar›n›n ortalama a¤›rl›¤› 1098 ± 804 mg (110- 3600)’d›. Adenom a¤›rl›¤› ile serum kalsiyum konsantrasyonlar› aras›nda anlaml› pozitif korelasyon (r=0,33, p<0,05) ve 25(OH)D3 konsantrasyonlar› aras›nda anlaml› negatif korelasyon (r=-0,43, p<0,01) tespit edildi. Ayr›ca 25(OH)D3 ile PTH (r=-0,29, p<0,05) ve ALP(r=-0,36, p<0,05) aras›nda anlaml› negatif korelasyon, PTH ile ALP konsantrasyonlar› aras›nda anlaml› pozitif bir korelasyon (r=0,50, p=0,001) saptand›. Sonuç: Çal›flmam›zda paratiroid adenomu a¤›rl›¤› ile serum kalsiyum konsantrasyonlar› aras›ndaki pozitif korelasyon, adenom a¤›rl›¤›n›n, hastal›¤›n laboratuvar ve klinik prezentasyonunu etkiledi¤ini göstermektedir. Paratiroid adenomu a¤›rl›¤› ve 25(OH)D3 düzeyi aras›ndaki negatif korelasyon, D vitamini eksikli¤inin yayg›n olarak görüldü¤ ü ülkemiz için kayda de¤er bir bulgudur. D vitamini eksikli¤i, ülkemizde, asemptomatik primer hiperparatiroidi yan›nda, ciddi klinik bulgularla baflvuran vakalar›n s›k olarak görülmesine katk›da bulunabilir.
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