Bone marrow scintigraphy using technetium-99m antigranulocyte antibody in malignant lymphomas

Area of Science:

• Nuclear medicine imaging
• Oncology
• Hematology

Background:

• Malignant lymphoma can infiltrate bone marrow, impacting prognosis and treatment.
• Accurate detection of bone marrow infiltration is crucial for staging and management.
• Immunoscintigraphy (IS) offers a potential non-invasive method for assessing bone marrow involvement.

Purpose of the Study:

• To evaluate the clinical reliability of immunoscintigraphy (IS) for detecting bone marrow infiltration in lymphoma patients.
• To compare IS findings with standard diagnostic methods like bone marrow biopsy and MRI.

Main Methods:

• Whole-body IS was performed on 103 patients with Hodgkin's disease (HD) or non-Hodgkin's lymphoma (NHL) using Tc-99m labeled anti-NCA-95.
• Findings were correlated with posterior iliac crest biopsy, MRI, and follow-up examinations.
• Sensitivity and specificity were calculated for different lymphoma subtypes.

Main Results:

• IS showed concordant results with biopsy in 69 patients and discordant in 34.
• In 29 patients with discordant results, IS indicated infiltration where biopsy was negative.
• IS demonstrated high sensitivity and specificity for HD (100%, 84%) and high-grade NHL (93%, 84%), with moderate sensitivity for low-grade NHL (60%).

Conclusions:

• Bone marrow scintigraphy using antigranulocyte antibodies is highly sensitive for HD and high-grade NHL.
• Positive IS findings after a negative biopsy necessitate further evaluation, such as MRI or guided re-biopsy.
• IS can be a valuable tool in the diagnosis and management of bone marrow infiltration in lymphoma.