Case Report of a Satin Guinea Pig with Fibrous Osteodystrophy That Resembles Human Pseudohypoparathyroidism

Table 2

Parathyroid hormone values measured two times in the same serum sample of 4 guinea pigs in relation to ionized calcium, creatinine, and disease.

Case	PTH (pg/dL)	PTH bis (pg/dL)	PTH above the interval of reference (25, 6–29 pg/dL)	iCa (mmol/L)	Creatinine (mg/dL)	Disease
1	592	562	Yes	1.36	0.47	SGPS of this case report
2	81	87	Yes	1.36	3.28	Bilateral hydronephrosis caused by ureteral stones (necropsy)
3	28	27.1	No	1.6	1.04	No
4	25.6	29	No	1.59	0.27	No

These eight PTH values correlate with the level of ionized calcium. In case , the increase in PTH is presumably due to an impaired kidney function, which contrasts with the marked increase and normal kidney function of PTH in case ; reference values for ionized calcium and creatinine are shown in Table 1; PTH interval of reference was obtained from paired measurements of two healthy animals, cases and 4.