Pancreas
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Islets of Langerhans
Islet of Langerhans, normal
Here is a normal pancreatic islet of Langerhans surrounded by normal exocrine pancreatic acinar tissue. The islets contain alpha cells secreting glucagon, beta cells secreting insulin, and delta cells secreting somatostatin.
Islet of Langerhans, , immunoperoxidase staining with antibody to insulin (on right) and glucagon (on left)
Immunoperoxidase staining can help identify the nature of the cells present in the islets of Langerhans. On the right, antibody to insulin has been employed to identify the beta cells. On the left, antibody to glucagons identifies the alpha cells.
Islet of Langerhans, insulitis in type I diabetes mellitus
The presence of the lymphocytic infiltrates in this edematous islet suggests an autoimmune mechanism for this process. The destruction of the islets leads to an absolute lack of insulin that characterizes type I diabetes mellitus.
Islet of Langerhans, amyloid deposition in type II diabetes mellitus
This islet of Langerhans demonstrates pink hyalinization (with deposition of amyloid) in many of the islet cells. This change is common in the islets of patients with type II diabetes mellitus.
Islet of Langerhans, islet cell adenoma LPO
An islet cell adenoma is seen here, separated from the pancreas by a thin collagenous capsule. A few normal islets are seen in the pancreas at the right for comparison.
Medium power
The islet cell adenoma at the left contrasts with the normal pancreas with islets at the right. Some of these adenomas function. Those that produce insulin may lead to hypoglycemia. Those that produce gastrin may lead to multiple gastric and duodenal ulcerations (ZollingerEllison syndrome).
Islet of Langerhans, islet cell adenoma with immunoperoxidase staining with antibody to insulin, (insulinoma)
This is an immunohistochemical stain for insulin in the islet cell adenoma. Thus, it is an insulinoma.
Gigi - sec D – ustmed2007
Islet of Langerhans, normal
Here is a normal pancreatic islet of Langerhans surrounded by normal exocrine pancreatic acinar tissue. The islets contain alpha cells secreting glucagon, beta cells secreting insulin, and delta cells secreting somatostatin.
Islet of Langerhans, , immunoperoxidase staining with antibody to insulin (on right) and glucagon (on left)
Immunoperoxidase staining can help identify the nature of the cells present in the islets of Langerhans. On the right, antibody to insulin has been employed to identify the beta cells. On the left, antibody to glucagons identifies the alpha cells.
Islet of Langerhans, insulitis in type I diabetes mellitus
The presence of the lymphocytic infiltrates in this edematous islet suggests an autoimmune mechanism for this process. The destruction of the islets leads to an absolute lack of insulin that characterizes type I diabetes mellitus.
Islet of Langerhans, amyloid deposition in type II diabetes mellitus
This islet of Langerhans demonstrates pink hyalinization (with deposition of amyloid) in many of the islet cells. This change is common in the islets of patients with type II diabetes mellitus.
Islet of Langerhans, islet cell adenoma LPO
An islet cell adenoma is seen here, separated from the pancreas by a thin collagenous capsule. A few normal islets are seen in the pancreas at the right for comparison.
Medium power
The islet cell adenoma at the left contrasts with the normal pancreas with islets at the right. Some of these adenomas function. Those that produce insulin may lead to hypoglycemia. Those that produce gastrin may lead to multiple gastric and duodenal ulcerations (ZollingerEllison syndrome).
Islet of Langerhans, islet cell adenoma with immunoperoxidase staining with antibody to insulin, (insulinoma)
This is an immunohistochemical stain for insulin in the islet cell adenoma. Thus, it is an insulinoma.
Gigi - sec D – ustmed2007
