Characteristics of patients with negative perchlorate tests
| Patient | % discharge of radioiodide | Familial/sporadic | Goitre Y/N | DVA Y/N |
|---|---|---|---|---|
| 1 | 9.0 | Sporadic | N | Y |
| 2 | 10.0 | Sporadic | N | Y |
| 31-150 | 8.1 | Familial | Y | N |
| 4 | 7.0 | Sporadic | Y | Y |
| 5 | 8.0 | Sporadic | N | Y |
DVA = dilated vestibular aqueduct radiologically.
↵1-150 The basis of the diagnosis in the sib of patient 3 was congenital deafness, goitre, and positive perchlorate discharge test (40% discharge).