99mTc-METHOXY-ISOBUTYL-ISONITRILE (SESTAMIBI) IMAGING OF MALIGNANT CANINE LYMPHOMA

EVALUATION OF LYMPHOMA IN A CAT USING 99mTc-SESTAMIBI

This report describes the evaluation of cutaneous lymphoma in a cat using 99mTc-sestamibi. A mass in the left pes with extension to the left popliteal lymph node was diagnosed as B-cell lymphoma. Thoracic and abdominal radiography and abdominal ultrasound were unremarkable. Scintigraphy using 99mTc-sestamibi confirmed the lesion was confined to the left hind leg, and the leg was amputated. The cat made a full recovery.

Oncological scintigraphy in dogs with 99mTechnetium MIBI and DMSA(V)--two case reports

Oncological scintigraphy is described in two dogs with malignant lymphoma and malignant schwannoma, respectively. The distribution of the radiopharmaceuticals could be visualized for the purpose of detection of neoplasia and eventual metastases, and to evaluate the effectivity of therapy. It is concluded that 99mTechnetium MIBI and 99mTc DMSA (V) scintigraphy is useful for the detection of soft tissue malignancy in dogs.

Effect of a static magnetic field on blood flow to the metacarpus in horses

OBJECTIVE

To determine the effect of a static magnetic field on relative blood flow to the metacarpus of horses.

DESIGN

Randomized controlled clinical trial.

ANIMALS

6 healthy adult horses.

PROCEDURE

Red blood cells were radiolabeled in vivo by administration of technetium Tc 99m (pyro- and trimeta-) phosphates, and scintigraphic images were obtained 30 minutes later. A magnetic wrap that emitted a static magnetic field was applied to 1 metacarpus and a control wrap was applied to the contralateral metacarpus. Forty-eight hours later, the wraps were removed, and scintigraphy was repeated. Relative perfusion ratios were calculated by dividing mean count per pixel for the portion of the metacarpus under the wrap by mean count per pixel for a portion of the distal aspect of the antebrachium that was not in the magnetic field.

RESULTS

The difference between the relative perfusion ratio prior to application of the wrap and the ratio after application of the wrap for limbs that received the magnetic wrap was not significantly different from the difference in ratio for limbs that received the control wrap.

CONCLUSIONS AND CLINICAL RELEVANCE

Results suggest that in horses, the static magnetic field associated with application of commercially available magnetic wraps for 48 hours does not increase blood flow to the portion of the metacarpus underneath the wrap.