J Korean Radiol Soc.  1995 Jan;32(1):45-49.

MRI of the TSH(Thyroid Stimulating Hormone) -Secreting Pituitary Adenoma

• Kim DI
• Lee EG
• Kang BC
• Chung TS
• Cho YK
• Jung JK

Abstract

PURPOSE
To demonstrate and evaluate the value of MRI findings of the TSH(Thyroid-Stimulating Hormone, TSH, Thyrotropin)-secreting pituitary adenoma.
MATERIALS AND METHODS
The authors reviewed retrospectively the MR images of 4 patients with TSH-secreting pituiatary adenoma. Evaluation of the anatomical location, signal characteristics, enhancement patterns, size, shape and circunferential changes were made.
RESULTS
No characteristic common MR findings in size, shape, signal intensity, and circumferential changes of TSH-secreting pituiatary adenoma waere observed among 4 cases(size; 5x7 mm to 10x11 mm, shape;ovoid to round, signal intensity;high in 1 case on T1 and T2WI, isosignal intensity in the other 3 cases, circumferential change; stalk deviation in 1 case, no stalk deviation in 3 cases). But, the tumors were centrally located at the anterior pituitary gland and showed relatively homogeneous signal intensity on MR images of all 4 patients.
CONCLUSION
We conclude that centrally-located mass at the anterior pituitary gland with homogeneous signal intensity on MR image may be suggestive of the TSH-secreting pituitary adenoma, although the MR findings are not specific for the disease.

MeSH Terms

Adenoma
Humans
Magnetic Resonance Imaging*
Pituitary Gland, Anterior
Pituitary Neoplasms*
Retrospective Studies