Runaway Train: A Leaky Radiosensitive SCID with Skin Lesions and Multiple Lymphomas

Area of Science:

• Immunology
• Genetics
• Oncology

Background:

• The Artemis nuclease is crucial for T-cell and B-cell receptor development and DNA repair.
• Artemis gene mutations can cause severe combined immunodeficiency (SCID) or a milder
• leaky
• SCID.

Observation:

• A young male presented with aggressive, progressing lymphoproliferative skin lesions and EBV+ B-cell lymphomas.
• A hypomorphic mutation in the Artemis gene was identified via whole exome sequencing.

Findings:

• The patient's condition was linked to a hypomorphic Artemis gene mutation.
• Despite a successful haploidentical stem cell transplant, the patient later died from Pneumocystis jirovecii pneumonia.

Implications:

• This case highlights the critical role of next-generation sequencing in diagnosing severe immunodeficiencies.
• Early and accurate diagnosis of Artemis mutations is vital for managing associated lymphoproliferative disorders and immunodeficiency.