An HL7 v2 message is composed of segments, each containing fields and components. Key segments relevant to histology include:
MSH (Message Header): Contains metadata about the message, such as sending and receiving applications, and timestamp. PID (Patient Identification): Includes patient-related information like name, ID, and demographics. OBR (Observation Request): Contains details about the ordered test, including the test code and specimen information. OBX (Observation Result): Holds the actual test results, such as the histological findings and diagnostic interpretations.
