Table 2 Pigments and staining methods
From: Considerations in hiPSC-derived cartilage for articular cartilage repair
| Non-hematogenous pigment | Hematogenous pigment | |||
|---|---|---|---|---|
| Staining | Lipofuscin | Melanin | Chromaffin | |
| Bleach | Sensitive | Sensitive | Weakly sensitive | Resistant |
| PAS | Positive | Negative | Negative | Negative |
| Giemsa | Ortho-chromasia (dark blue) | Meta-chromasia (dark green) | Meta-chromasia (red purple) | |
| Schmorl’s reaction | Positive | Positive | Weakly positive | |
| Berlin blue | Negative | Negative | Negative | Positive (hemosiderin) |