Nuclear medicine - Tc99m pertechnetate
What percentage of ectopic thyroid is associated with hypothyroidism?
Approximately 33 percent.
What are the most probable sites for ectopic thyroid tissue?
Ectopic thyroid tissue can be found in any place along its route of descent starting from foramen cecum to mediastinum.
What is the condition associated with ovarian tumors and hyperthyroidism?
Struma ovarii.
What is the best way to obtain diagnostic confirmation?
Histopathological evidence via biopsy to rule out malignancy.
Planar imaging revealed diffuse and homogenous tracer uptake in normal located thyroid gland. An area of increased tracer accumulation was noted in right upper mediastinal region. Thyroid uptake was with in normal range.
To correctly and surely localise the lesion, SPECT-CT was acquired as well. SPECT-CT revealed soft tissue lesion in superior mediastinum with increased tracer uptake and calcifications.