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Table 3 Change in patients’ management after addition of SPECT/CT for characterization of RM lesion

From: Rare sites of metastases in patients with differentiated thyroid carcinoma and added value of SPECT/CT over planar whole body radioactive iodine scan

Cases

*Misdiagnosis before SPECT/CT

After additional SPECT/CT

Management changed

1

Bone metastases/colonic activity

Kidney and pancreas metastases

No

2

Head lesion (pituitary lesion/skull metastases)

Metastasis in Sella turcica

Prevent unnecessary surgery + RTH

3

Salivary activity

Muscle metastasis

No

4

Cervical LN

Para pharyngeal mass

No

5

Colonic activity/contamination

Solitary iliac bony mass

 + RTH

6

Head lesion (bone /brain)

Solitary brain metastasis

 + RTH

7

Chest lesion (Lung /bone)

Bone metastases from PTC

 + RTH

8

Eye lesion (Eye melanoma/metastases)

Eye metastasis

Prevent surgery (eye enucleation)

9

Cervical LN

IJV malignant thrombosis

 + surgical excision

10

Chest lesion (Lung /bone)

Bone metastasis from PTC

 + RTH

11

Physiological renal activity

Renal metastases

NO

12

Primary brain tumor

Solitary Brain metastasis

 + surgical excision Brain RTH

13

Metastases of unknown origin

DTC with iodine avid Brain and liver metastases

RAIT + Brain RTH

14

Cervical LNs

Para Pharyngeal LN

NO

15

Thyroid residual

Endotracheal metastasis

 + RTH and CTH

  1. *Misdiagnosis occurred before additional SPECT/CT even in planar WBI scan or other diagnostic modalities (CT or MRI)
  2.  + Addition
  3. /Versus