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  • Title: Calcium metabolism and its regulating hormones in patients with leprosy.
    Author: Mautalen CA, Vaquero NL, Zeni SN, Mendez MA, Gonzalez DC, Bagur AC, Casco CA, Ladizesky MG.
    Journal: Int J Lepr Other Mycobact Dis; 1994 Dec; 62(4):580-5. PubMed ID: 7868957.
    Abstract:
    Calcium metabolism was studied in 47 patients with borderline or lepromatous leprosy. Total and ionized calcium, phosphorus, creatinine, total alkaline phosphatase, parathyroid hormone (PTH), 25-hydroxy vitamin D [25(OH)D], and 1,25-dihydroxy vitamin D [1,25(OH)2D] were measured in serum; calcium and total hydroxyproline were determined in urine. Total subperiosteal diameter and medullar cavity diameter were measured on an X-ray of the hand of all patients. Average values were within normal ranges for all of the biochemical determinations. Total serum calcium was moderately below the normal range in eight patients but ionized calcium levels were within the normal ranges in all of the patients. Four patients, all of them with lepromatous leprosy, had levels of 1,25(OH)2D higher than normal but none of them was hypercalcemic and PTH levels were within normal range. Although all values were within the normal ranges, lepromatous leprosy patients had lower total calcium, higher alkaline phosphatase, and higher urinary hydroxyproline than borderline leprosy patients (9.1 +/- 0.4 vs 9.4 +/- 0.3 mg%, p < 0.001; 10.3 +/- 2.9 vs 7.4 +/- 2.3 King-Armstrong units, p < 0.02 and 27.2 +/- 12 vs 19.4 +/- 5.6 mg/24 hr, p < 0.02, respectively). No differences were found between patients and controls in the average micrometric measurements of the second metacarpal bone but significant osteopenia was found in 19% of the patients. The main finding of the present study in a representative sample of leprosy patients is that the average total serum calcium was in the lowest limit of the normal range, but the ionized serum calcium was in the middle of the normal range.(ABSTRACT TRUNCATED AT 250 WORDS)
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