twinter,
I also used AI to determine what BH stands for and it confirms what you posted: initials of the patient. Here is a detailed response:

Quote:

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BH stands for the initials of the specific patient's first and last names (e.g., "B" for the first name and "H" for the last name). In single-patient Expanded Access Protocols (EAPs), such as those submitted to the FDA under Form 3926 for investigational drugs like leronlimab, patient identifiers are anonymized to protect privacy and comply with regulations like HIPAA. Public or regulatory documents use only these initials instead of full names to avoid disclosing protected health information (PHI). This is a standard practice across institutions, including City of Hope, for compassionate use protocols in conditions like metastatic triple-negative breast cancer (mTNBC).

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