Lymphoscintigraphy

A dose of 15 MBq (0.4 mCi) of 99mTc antimony sulphide colloid was injected intradermally around the excision biopsy site. On the early dynamic image, several lymphatic vessels were observed passing up the right arm from the injection sites around the excision-biopsy scar (Fig. 11). Two nodes were observed on the early image, one in the right epitrochlear region and the other an interval node medially in the arm at midhumeral level. These nodes were again evident on the delayed scan performed 2 hours later. However, there were also three small focal

Figure 11 On the early dynamic image (left), several lymphatic vessels are observed passing up the right arm from the injection site on the right wrist. Two nodes are observed on this early image, one in the right epitrochlear region (short curved arrow) and the other an interval node medially in the arm (long curved arrow) somewhat higher up. These nodes are again evident on the delayed scan performed 2 hours later (right). There are also three small focal areas of tracer retention (horizontal arrow) that lie over the lateral aspect of the elbow, as well as faint activity in right secondary nodes in the axilla (open curved arrow).

Epitrochlear Lymph Node

Figure 11 On the early dynamic image (left), several lymphatic vessels are observed passing up the right arm from the injection site on the right wrist. Two nodes are observed on this early image, one in the right epitrochlear region (short curved arrow) and the other an interval node medially in the arm (long curved arrow) somewhat higher up. These nodes are again evident on the delayed scan performed 2 hours later (right). There are also three small focal areas of tracer retention (horizontal arrow) that lie over the lateral aspect of the elbow, as well as faint activity in right secondary nodes in the axilla (open curved arrow).

areas of tracer retention overlying the lateral aspect of the elbow, as well as faint activity in right axillary nodes.

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