Assessment of endocrine disorders of the hypothalamicpituitary axis by nuclear medicine techniques

M. Schmidt; F. Jockenhövel; P. Theissen; M. Dietlein; W. Krone; H. Schicha

doi:10.1055/s-0038-1625645

Nuklearmedizin - NuclearMedicine, Table of Contents

Nuklearmedizin 2002; 41(02): 80-90
DOI: 10.1055/s-0038-1625645

Originalarbeiten – Original Articles

Schattauer GmbH

Assessment of endocrine disorders of the hypothalamicpituitary axis by nuclear medicine techniques

Nuklearmedizinische Verfahren zur Abklärung endokrinologischer Erkrankungen der Hypothalamus- Hypophysen-Achse

M. Schmidt

¹Klinik und Poliklinik für Nuklearmedizin

,

F. Jockenhövel

²Klinik II für Innere Medizin, Universität zu Köln, Deutschland

,

P. Theissen

¹Klinik und Poliklinik für Nuklearmedizin

,

M. Dietlein

¹Klinik und Poliklinik für Nuklearmedizin

,

W. Krone

²Klinik II für Innere Medizin, Universität zu Köln, Deutschland

,

H. Schicha

¹Klinik und Poliklinik für Nuklearmedizin

› Author Affiliations

Abstract

Summary

The following article reviews nuclear medicine techniques which can be used for assessment of endocrine disorders of the hypothalamic-pituitary axis. For planar and SPECT imaging somatostatin-receptor- and dopamine- D2-receptor-scintigraphy are the most widely distributed techniques. These nuclear medicine techniques may be indicated in selected cases to answer differential diagnostic problems. They can be helpful to search for presence and localization of receptor positive tissue. Furthermore they can detect metastasis in the rare cases of a pituitary carcinoma. Scintigraphy with Gallium-67 is suitable for further diagnostic evaluation in suspected hypophysitis. Other SPECT radiopharmaca do not have relevant clinical significance. F-18-FDG as PET radiopharmacon is not ideal because obvious pituitary adenomas could not be visualized. Other PET radiopharmaca including C-11-methionine, C-11-tyrosine, F-18-fluoroethylspiperone, C-11-methylspiperone, and C-11-raclopride are available in specialized centers only. Overall indications for nuclear medicine in studies for the assessment of endocrine disorders of the hypothalamic-pituitary-axis are rare. Original studies often report only about a small number of patients. According to the authors’ opinion the relevance of nuclear medicine in studies of clinically important endocrinologic fields, e. g. localization of small ACTH-producing pituitary adenomas, tumor localization in ectopic ACTH syndrome, localization of recurrent pituitary tissue, assessment of small incidentalomas, can not be definitely given yet.

Zusammenfassung

Diese Übersichtsarbeit fasst die nuklearmedizinischen Untersuchungsverfahren zur Abklärung endokrinologischer Erkrankungen der Hypothalamus-Hypophysen- Achse zusammen. Bei den planaren und SPECT-Unter suchungen sind Somatostatin-Rezeptor- und Dopamin- D2-Rezeptor-Szintigraphie die verbreitetsten Untersuchungstechniken. Im Einzelfall sind sie zur Differenzialdiagnostik, zum Nachweis und zur Lokalisation von rezeptorpositivem Gewebe und zur Metastasensuche beim seltenen Hypophysenkarzinom sinnvoll. Die Szintigraphie mit Gallium-67 ist zwecks weiterer Abklärung bei der Verdachtsdiagnose Hypophysitis geeignet. Andere SPECT-Radiopharmaka haben keine relevante klinische Bedeutung. F-18-FDG stellt kein ideales PETRadiopharmakon dar, weil damit gesicherte Hypophysenadenome nicht dargestellt werden konnten. Die PET-Radiopharmaka C-11-Methionin bzw. -Tyrosin, F-18- Fluorethylspiperon, C-11-Methylspiperon und -Racloprid stehen nur in spezialisierten Zentren zur Verfügung. Insgesamt sind die Indikationen für nuklearmedizinische Untersuchungen bei endokrinologischen Erkrankungen der Hypothalamus-hypophysen-Achse selten. Der Nutzen nuklearmedizinischer Untersuchungsverfahren bei klinisch relevanten endokrinologischen Fragen (Lokalisation kleiner ACTH-produzierender Hypophysenadenome, Tumorsuche bei ektoper ACTH-Produktion, Nachweis von Hypophysenadenomrestgewebe, Abklärung kleiner Inzidentalome) kann nach Meinung der Autoren nicht abschließend beantwortet werden.

Keywords

Pituitary disease - hypothalamic-pituitary axis - radionuclide imaging - SPECT - PET

Schlüsselwörter

Hypophysenerkrankung - Hypothalamus-Hypophysen- Achse - Radionukliddiagnostik - SPECT - PET

Full Text

References

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