Insulinoma differential diagnosis
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Amandeep Singh M.D.[2]
Overview
Insulinoma must be differentiated from other diseases that cause features of hypoglycemia like palpitations, profuse sweating, dizziness, such as [differential dx1], [differential dx2], and [differential dx3].
OR
Insulinoma must be differentiated from the exogenous use of insulin, drugs causing hypoglycemia like sulfonylureas.
Differentiating insulinoma from other Diseases
- [Disease name] must be differentiated from other diseases that cause [clinical feature 1], [clinical feature 2], and [clinical feature 3], such as [differential dx1], [differential dx2], and [differential dx3].
- [Disease name] must be differentiated from [[differential dx1], [differential dx2], and [differential dx3].
- As [disease name] manifests in a variety of clinical forms, differentiation must be established in accordance with the particular subtype. [Subtype name 1] must be differentiated from other diseases that cause [clinical feature 1], such as [differential dx1] and [differential dx2]. In contrast, [subtype name 2] must be differentiated from other diseases that cause [clinical feature 2], such as [differential dx3] and [differential dx4].
Preferred Table for differentials for Hypoglycemia
Diagnoses | Laboratory Findings differentiating among causes of Hypoglycemia | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
S.Glucose (mg/dL)/(mmol/L) |
C Peptide (pmol/L) | S.Insulin (μU/mL)/(pmol/L) | S.Proinsulin (pmol/L) |
S. Beta hydroxybutyrate | Glucose increase after glucagon(mg/dL) | Oral Hypoglycemic agent | Antibodies to Insulin | |||
Exogenous Insulin | <55/2.5 | <200 | >>3 | <5 | ≤2.7 | >25 | - | - | ||
Insulinoma/Nesidioblastosis/PGPH† | <55 | >3 | ≥5 | ≤2.7 | >25 | - | - | |||
Autoimmune Insulin | <50 | ↓ | >>5 | ≤2.7 | >25 | - | + | |||
Oral hypoglycemic agent | <50 | ≥5 | ≤2.7 | >25 | + | - | - | - | ||
Normal/Fasting | <50 | <3/20.8 | <5 | >2.7 | <25 | - | - |
† PGPH= Post Gastric Bypass Hypoglycemia