insulinoma

This term is a specialized medical descriptor used primarily in endocrinology and oncology. It carries a clinical, neutral tone and is typically encountered in diagnostic reports, medical journals, or patient charts rather than in general conversation.

Because it refers to a specific pathological growth, it is treated as a countable noun in clinical settings, allowing for the discussion of single or multiple tumors (e.g., a solitary insulinoma versus multiple insulinomas).