Paraneoplastic autoimmune thrombocytopenia in solid tumors

Area of Science:

• Hematology
• Oncology
• Immunology

Background:

• Immune-mediated hematological diseases, including autoimmune thrombocytopenia (ITP), are rare paraneoplastic syndromes.
• An association between ITP and solid cancers has been observed across various malignancies.

Purpose of the Study:

• To critically analyze published cases of ITP associated with solid cancers.
• To understand the relationship between ITP onset and cancer diagnosis/treatment.
• To evaluate treatment outcomes for ITP in the context of cancer.

Main Methods:

• Systematic review and critical analysis of 68 published cases of ITP and solid cancer association.
• Categorization of cases based on cancer type, ITP timing relative to cancer diagnosis, and treatment response.

Main Results:

• ITP associated with lung, breast, renal cell, and ovarian cancers was most common.
• ITP occurred concurrently with cancer in ~50% of cases, preceding it in ~25%, and following it in others.
• Steroid treatment was effective for most ITP cases; complete ITP remission post-cancer treatment was rare.

Conclusions:

• Cancer-associated ITP should be considered in patients with ITP, but extensive cancer screening is not routinely indicated without suspicion.
• Cancer resection is recommended for non-metastatic cases of cancer-associated ITP.
• Steroids are the likely treatment of choice for ITP in metastatic cancer cases.