PubMed Health⌕ Search

PubMed · 8597491

[Techniques for thyroid imaging].

Abstract

Advances in imaging techniques has improved our understanding of diseases. The different imaging techniques for visualizing the thyroid parenchyma, including cytopuncture, sonography, CT-scan, scintigraphy, magnetic resonance imaging, have provided various types of information. Do these techniques really provide the clinician with the answers to his question? The information provided by the different imaging techniques is presented together with the insufficiencies of each method. Faced with the rising cost of health services, we developed analysis instruments which should help the clinician in a more rational use of diagnostic examinations. The question which most often arises is that of an isolated nodule within a multinodular goiter: is it malignant or benign? the analysis of the available techniques shows that the cost-effective strategy uses conventional Tc99m or I123 scintigraphy and thallium 201 scintigraphy. With this strategy, the risk of missing a thyroid cancer is approximately 1.75%. With cytopuncture, this risk is multiplied by a factor of 2.5 reaching 4.5%.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

J Hermans. 1995. [Techniques for thyroid imaging].. https://pubmed.ncbi.nlm.nih.gov/8597491/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Diagnosis of hematopoietic processes by fine-needle aspiration in conjunction with flow cytometry: A review of 127 cases.

Although fine-needle aspiration (FNA) is accepted as the method of choice for the initial evaluation of lymph nodes for metastatic carcinomas, its utility as the initial diagnostic procedure for hematopoietic processes is less established. We review our experience over a 3-year period with 127 FNA cases accompanied by flow cytometric (FC) analysis from 117 patients. Fifty cases had subsequent histologic examination. A hematopoietic process was identified in 85 cases, a reactive process in 27 cases, and a nonhematopoietic process in 15 cases. All non-Hodgkin lymphomas (NHL) were B-cell processes except for one T-cell lymphoma. By FNA/FC, 44 NHL had sufficient findings to be subtyped; of these, 27 had subsequent histologic examination. The correlation between the FNA/FC and histologic classification in these cases of NHL was 100%. One case was insufficient for diagnosis by FNA and six cases were inadequate for FC. We conclude that FNA in conjunction with FC can be used as the initial diagnostic approach for both primary and recurrent hematopoietic processes.

Biopsy, Needle↗

Fine-needle aspiration cytology of pseudosarcomatous lesions of soft tissue.

Pseudosarcomatous lesions are benign neoplasms of the musculoskeletal system that are likely to be misdiagnosed as malignant, based on clinical and histologic features. These include soft-tissue "tumors" considered reactive or reparative lesions such as nodular fasciitis and myositis ossificans. Also included in the "pseudosarcoma" category are benign neoplasms which show "pseudoanaplastic" cytologic atypia. The latter include lipoma, leiomyoma, angiomyolipoma, and benign peripheral nerve-sheath tumors. These neoplasms, particularly the reparative processes and the nerve sheath tumors, are increasingly being subjected to initial diagnosis by fine-needle aspiration cytology. Even by conventional cytology this group of lesions represents a well-known pitfall for the diagnostic pathologist. We review some cytologic features: repair-like change, cohesion of cellular fragments, and presence of "normal" elements in the aspirate, which may help the cytopathologist avoid misdiagnosis of these notoriously difficult entities.

Biopsy, Needle↗