Atypical short tandem repeat allelic patterns in a sexual assault case involving hematopoietic stem cell transplantation.
Jeongyong Kim, Mu Yeong Lee, Dong Woo Kim et al.
✦ AI-curated · Sources linked
Case in brief
A female victim of sexual assault underwent forensic examination, revealing conflicting short tandem repeat (STR) profiles in various biological samples. The victim's history of allogeneic bone marrow transplantation was crucial, as it explained the presence of a second female STR profile from the donor. Hair follicle analysis confirmed the donor's genotype, highlighting the complexities introduced by transplantation in forensic DNA analysis.
What made this case unusual
The case illustrates how allogeneic bone marrow transplantation can lead to mixed STR profiles, complicating forensic interpretations and potentially resulting in misidentification.
Diagnostic / clinical pearl
Clinicians and forensic analysts should consider a patient's history of bone marrow transplantation when interpreting STR profiles in sexual assault cases to avoid misinterpretation of forensic evidence.
Why it matters
This case highlights the need for updates in standard sexual assault evidence forms to include medical histories that may affect forensic analysis, ensuring accurate interpretations in future investigations.