Esoterix
Synonyms
Insulin-like Growth Factors Somatomedin C
Expected Turnaround Time
3 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Specimen Requirements
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.1 mL (Note: This volume does not allow for repeat testing.)
Container
Red-top tube or gel-barrier tube
Collection
Separate within one hour; transfer into a plastic transport tube.
Storage Instructions
Ship frozen on dry ice.
Test Details
Methodology
Blocking radioimmunoassay (RIA) after acid:alcohol extraction
Reference Interval
Term Preterm Age Range (ng/mL) Mean (ng/mL) Range (ng/mL) Mean (ng/mL) Birth 15 - 109 59 21 - 93 51 2m 15 - 109 55 23 - 163 81 4m 7 - 124 50 23 - 171 74 6m 7 - 93 41 15 - 132 61 12m 15 - 101 56 15 - 179 77 Male Female Age Range (ng/mL) Mean (ng/mL) Range (ng/mL) Mean (ng/mL) 1-2y 30 - 122 76 56 - 144 100 Age Tanner Stage Female Range Female Mean 3y 1 26 - 162 77 4y 1 32 - 179 88 5y 1 39 - 198 100 6y 1 47 - 217 113 7y 1 55 - 238 127 8y 1 64 - 259 142 8y 2 89 - 369 181 9y 1 74 - 282 158 9y 2 96 - 399 196 9y 3 192 - 568 350 10y 1 85 - 306 175 10y 2 104 - 431 212 10y 3 192 - 568 350 10y 4 and 5 279 - 664 446 11y 1 97 - 332 194 11y 2 112 - 466 229 11y 3 192 - 568 350 11y 4 and 5 268 - 646 433 12y 1 110 - 358 213 12y 2 121 - 504 247 12y 3 192 - 568 350 12y 4 and 5 248 - 612 406 13y 2 131 - 545 267 13y 3 192 - 568 350 13y 4 and 5 229 - 579 380 14y 2 136 - 566 278 14y 3 192 - 568 350 14y 4 and 5 211 - 547 356 15y 3 192 - 568 350 15y 4 and 5 194 - 516 332 16y 4 and 5 177 - 487 309 17y 4 and 5 162 - 458 287 18y 4 and 5 147 - 430 266 Age Tanner Stage Male Range Male Mean 3y 1 20 - 141 63 4y 1 25 - 157 73 5y 1 30 - 174 84 6y 1 37 - 192 96 7y 1 44 - 211 109 8y 1 52 - 231 123 8y 2 and 3 39 - 264 121 9y 1 61 - 252 137 9y 2 and 3 52 - 304 146 10y 1 71 - 275 153 10y 2 and 3 67 - 347 174 11y 1 82 - 299 170 11y 2 and 3 86 - 393 206 11y 4 and 5 277 - 673 449 12y 1 93 - 324 188 12y 2 and 3 106 - 443 240 12y 4 and 5 265 - 652 433 13y 1 106 - 350 207 13y 2 and 3 130 - 497 277 13y 4 and 5 241 - 612 401 14y 1 120 - 377 227 14y 2 and 3 156 - 554 318 14y 4 and 5 220 - 574 372 15y 1 127 - 391 237 15y 2 and 3 185 - 616 362 15y 4 and 5 199 - 537 343 16y 2 and 3 201 - 648 386 16y 4 and 5 180 - 501 316 17y 4 and 5 161 - 467 290 18y 4 and 5 144 - 434 266 Male Female Age Range (ng/mL) Mean (ng/mL) Range (ng/mL) Mean (ng/mL) 19 - 20y 281 - 510 371 217 - 475 323 21 - 30y 155 - 432 289 87 - 368 237 31 - 40y 132 - 333 226 106 - 368 225 41 - 50y 121 - 237 160 118 - 298 205 51 - 60y 68 - 245 153 53 - 287 172 61 - 70y 60 - 220 132 75 - 263 180 71 - 80y 36 - 215 131 54 - 205 156