| Immunohistochemistry . | Available Stainings, n (%) . | Negative (%) . | Intermediate (%) . | Positive (%) . |
|---|---|---|---|---|
| Insulin | 80 (100) | 12 | 5 | 83 |
| Chromogranin A | 76 (95) | 0 | 10 | 90 |
| Synaptophysin | 69 (86) | 0 | 0 | 100 |
| Proinsulin | 65 (81) | 6 | 0 | 94 |
| UMB1 | 65 (81) | 43 | 12 | 45 |
| Amyloid | 65 (81) | 74 | 11 | 15 |
| Glucagon | 65 (81) | 91 | 6 | 3 |
| Pancreatic polypeptide | 48 (60) | 100 | 0 | 0 |
| CD117 | 48 (60) | 96 | 4 | 0 |
| Somatostatin | 48 (60) | 83 | 17 | 0 |
| Ki-67 | 65 (81) | — | — | — |
| Immunohistochemistry . | Available Stainings, n (%) . | Negative (%) . | Intermediate (%) . | Positive (%) . |
|---|---|---|---|---|
| Insulin | 80 (100) | 12 | 5 | 83 |
| Chromogranin A | 76 (95) | 0 | 10 | 90 |
| Synaptophysin | 69 (86) | 0 | 0 | 100 |
| Proinsulin | 65 (81) | 6 | 0 | 94 |
| UMB1 | 65 (81) | 43 | 12 | 45 |
| Amyloid | 65 (81) | 74 | 11 | 15 |
| Glucagon | 65 (81) | 91 | 6 | 3 |
| Pancreatic polypeptide | 48 (60) | 100 | 0 | 0 |
| CD117 | 48 (60) | 96 | 4 | 0 |
| Somatostatin | 48 (60) | 83 | 17 | 0 |
| Ki-67 | 65 (81) | — | — | — |
Numbers of available stainings and results of immunohistochemistry in 80 patients with insulinoma. Staining for insulin was done in all patients. Negative: <5% of cells with positive staining cells; intermediate: 5% to 50% of cells with positive staining; positive: >50% with positive staining.
| Immunohistochemistry . | Available Stainings, n (%) . | Negative (%) . | Intermediate (%) . | Positive (%) . |
|---|---|---|---|---|
| Insulin | 80 (100) | 12 | 5 | 83 |
| Chromogranin A | 76 (95) | 0 | 10 | 90 |
| Synaptophysin | 69 (86) | 0 | 0 | 100 |
| Proinsulin | 65 (81) | 6 | 0 | 94 |
| UMB1 | 65 (81) | 43 | 12 | 45 |
| Amyloid | 65 (81) | 74 | 11 | 15 |
| Glucagon | 65 (81) | 91 | 6 | 3 |
| Pancreatic polypeptide | 48 (60) | 100 | 0 | 0 |
| CD117 | 48 (60) | 96 | 4 | 0 |
| Somatostatin | 48 (60) | 83 | 17 | 0 |
| Ki-67 | 65 (81) | — | — | — |
| Immunohistochemistry . | Available Stainings, n (%) . | Negative (%) . | Intermediate (%) . | Positive (%) . |
|---|---|---|---|---|
| Insulin | 80 (100) | 12 | 5 | 83 |
| Chromogranin A | 76 (95) | 0 | 10 | 90 |
| Synaptophysin | 69 (86) | 0 | 0 | 100 |
| Proinsulin | 65 (81) | 6 | 0 | 94 |
| UMB1 | 65 (81) | 43 | 12 | 45 |
| Amyloid | 65 (81) | 74 | 11 | 15 |
| Glucagon | 65 (81) | 91 | 6 | 3 |
| Pancreatic polypeptide | 48 (60) | 100 | 0 | 0 |
| CD117 | 48 (60) | 96 | 4 | 0 |
| Somatostatin | 48 (60) | 83 | 17 | 0 |
| Ki-67 | 65 (81) | — | — | — |
Numbers of available stainings and results of immunohistochemistry in 80 patients with insulinoma. Staining for insulin was done in all patients. Negative: <5% of cells with positive staining cells; intermediate: 5% to 50% of cells with positive staining; positive: >50% with positive staining.
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