Table 3.
Comparison of targeted area and area obtained on TMA, per core
| Target diagnosis | TMA diagnosis | Frequency | Percent (%) |
|---|---|---|---|
| Normal TDLUs | ducts only | 36 | 3.3 |
| Normal TDLUs | normal TDLUs | 545 | 49.8 |
| Normal TDLUs | stroma | 322 | 29.4 |
| Normal TDLUs | apocrine metaplasia | 24 | 2.2 |
| Normal TDLUs | UDH | 10 | 0.9 |
| Normal TDLUs | no tissue | 158 | 14.4 |
| Total Normal TDLUs | 1095 | 100.0 | |
| UDH | ducts only | 4 | 0.9 |
| UDH | normal TDLUs | 75 | 16.7 |
| UDH | stroma | 121 | 26.9 |
| UDH | apocrine metaplasia | 26 | 5.8 |
| UDH | UDH | 173 | 38.4 |
| UDH | no tissue | 51 | 11.3 |
| Total UDH | 450 | 100.0 | |
| ADH | ducts only | 3 | 1.8 |
| ADH | normal TDLUs | 33 | 20.0 |
| ADH | stroma | 55 | 33.3 |
| ADH | apocrine metaplasia | 3 | 1.8 |
| ADH | ADH | 30 | 18.2 |
| ADH | no tissue | 41 | 24.9 |
| Total ADH | 165 | 100.0 | |
| ALH | ducts only | 5 | 5.6 |
| ALH | normal TDLUs | 16 | 17.8 |
| ALH | stroma | 23 | 25.6 |
| ALH | apocrine metaplasia | 2 | 2.2 |
| ALH | ALH | 28 | 31.1 |
| ALH | no tissue | 16 | 17.8 |
| Total ALH | 90 | 100.0 | |
| Total cores | 1,800 | ||
TMA=tissue microarray, TDLUs=terminal duct lobular units, UDH=usual ductal hyperplasia, ADH=atypical ductal hyperplasia, ALH=atypical lobular hyperplasia