title: 111In-octreotide and 99mTc(V)-dimercaptosuccinic acid studies in the imaging of recurrent medullary thyroid carcinoma.
abstract: Detection of recurrence from medullary thyroid carcinoma (MTC) remains a diagnostic problem, especially when increased serum tumour marker levels suggest recurrence and conventional imaging techniques are non-diagnostic. In this study, we performed 111In-octreotide and 99mTc(V)-dimercaptosuccinic acid (DMSA) scans in a series of eleven patients with MTC presenting with elevated serum tumour markers after surgery. 111In-octreotide whole body studies detected tumour in six of the eleven patients studied and detected nine tumoral localizations. 99mTc(V)-DMSA whole body studies detected tumour in five of the eleven patients studied and eight tumoral localizations. 111In-octreotide and 99mTc(V)-DMSA studies detected recurrence in all four patients with basal calcitonin levels above 1000 ng/l. We conclude that 111In-octreotide and 99mTc(V)-DMSA studies have limited sensitivity to detect recurrence in patients with MTC, although their sensitivity may improve with high serum calcitonin levels. These radionuclide imaging techniques should be employed when conventional imaging techniques are negative or inconclusive or, in the case of 111In-octreotide studies, should be employed when we went to investigate the presence of somatostatin receptors that provide the basis for treatment with somatostatin analogues.
authors.affiliation: Department of Nuclear Medicine, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Berná
authors.forename: R
authors.initials: R
authors.lastname: Cabezas
authors.forename: J
authors.initials: J
authors.lastname: Mora
authors.forename: G
authors.initials: G
authors.lastname: Torres
authors.forename: M
authors.initials: M
authors.lastname: Estorch
authors.forename: I
authors.initials: I
authors.lastname: Carrió
mesh_terms: D000328:Adult; D014408:Biomarkers, Tumor / Q000097:blood; D002116:Calcitonin / Q000097:blood; D018276:Carcinoma, Medullary / Q000097:blood / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000097:blood / Q000000981:diagnostic imaging*; D015282:Octreotide / Q000031:analogs & derivatives*; D015609:Organotechnetium Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives*; D011877:Radionuclide Imaging; D004113:Succimer; D019783:Technetium Tc 99m Dimercaptosuccinic Acid; D013964:Thyroid Neoplasms / Q000097:blood / Q000000981:diagnostic imaging*
chemical_list: D014408:Biomarkers, Tumor; D015609:Organotechnetium Compounds; C071632:SDZ 215-811; D019783:Technetium Tc 99m Dimercaptosuccinic Acid; D004369:Pentetic Acid; D002116:Calcitonin; D004113:Succimer; D015282:Octreotide