Table 1.
Common historical signs, physical examination, and laboratory findings in 462 cats with untreated hyperthyroidism
| Finding | Number of Cats | Percent of Cats (%) |
|---|---|---|
| Historical signs: | ||
| Weight loss | 425 | 92.0 |
| Increased appetite | 253 | 54.8 |
| Vomiting | 216 | 46.8 |
| Hyperactive | 190 | 41.1 |
| Polydipsia/polyuria | 152 | 32.9 |
| Diarrhea/increased fecal volume | 95 | 20.6 |
| Decreased activity | 60 | 13.0 |
| Heat intolerance | 59 | 12.8 |
| Physical examination findings: | ||
| Palpable thyroid nodule | 450 | 97.5 |
| Muscle wasting | 356 | 77.1 |
| Thin body condition | 160 | 34.6 |
| Dental disease | 206 | 44.6 |
| Tachycardia (≥240 bpm) | 145 | 31.4 |
| Cardiac murmur | 134 | 29.0 |
| Laboratory findings: | ||
| High alanine aminotransferase | 261 | 56.5 |
| High alkaline phosphatase | 107 | 23.2 |
| High aspartate aminotransferase | 52 | 11.3 |
| High hematocrit (PCV) | 50 | 10.8 |
| High serum T4 | 444 | 96.1 |
| High serum fT4 | 450 | 97.4 |
| High serum T3 | 281 | 60.1 |
| Low serum TSH | 453 | 98.1 |