Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0007097 (carcinoma)
 152,788 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Synchronous thyroid and thymic malignancy following childhood thymic irradiation has only been reported in two known cases previously, with a third case identified here. A rationale is presented for following these radiated patients as they age with thyroglobulin and thyroid-stimulating hormone (TSH) levels as a measure of risk of the development of nodular thyroid disease and, if such occurs, for an aggressive surgical approach. There exists a growing population at risk attributable to the success of radiation treatment of Hodgkin's and pediatric head and neck tumors. The question is raised regarding the theoretical benefits of thyroid suppressive therapy in this group at risk. With the instructive case presented, radical surgery for either thymic or thyroid carcinoma and careful monitoring for decades-late local recurrences of thymoma are suggested.
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PMID:Thyroid and thymic malignancy following childhood irradiation. 161 46

An extremely rare case of mucoepidermoid carcinoma of the thyroid in a 56-year-old woman is presented. The patient clinically having Hashimoto's thyroiditis was noted a nodule in her neck. The tumor was sited in the midportion of the left lobe of the thyroid, and histologically it showed both squamous features and mucin production. The squamous cells were arranged in solid sheets with horny pearls and the mucous cells tended to line dilated duct-like elements. Ultrastructurally, the epidermoid cells had aggregates of tonofilaments and well-developed desmosomal attachments, and the mucous cells contained numerous mucin granules in their cytoplasm. Immunohistochemical studies revealed that cytokeratin antibodies showed positivity for both the lining cells and squamous cells, whereas carcinoembryonic antigen positivity was found in the lining cells and intraluminal material. The tumor cells were negative for thyroglobulin, calcitonin, vimentin, chromogranin, and neuron-specific enolase. These unusual histologic and immunohistochemical features are suggestive of a tumor related to the so-called "solid cell nest" of the thyroid.
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PMID:Mucoepidermoid carcinoma of the thyroid gland. 169 44

The authors have used radioimmunoassay to measure blood serum thyroglobulin (TG) in 257 patients with benign processes and 118 ones with carcinoma of the thyroid and came to a conclusion that this method is unfit for the differential diagnosis between these conditions. Serum TG level is in good correlation with the results of treatment of thyroid carcinoma patients: in radically treated ones blood serum TG level reduces to the norm, and when recurrences or metastases develop it significantly increases. Therefore, radioimmunoassay is recommended for early detection of thyroid carcinoma recurrences and metastases in follow-up of patients with this condition.
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PMID:[Serum thyroglobulin in thyroid cancer and other thyroid diseases]. 169 58

In 111 thyroid cancer patients consisting of 89 papillary carcinomas, 17 follicular carcinomas, 2 medullary carcinomas, 1 squamous cell carcinoma and 2 malignant lymphomas, the levels of 12 tumor markers, including thyroglobulin (Tg), were measured in the serum by radioimmunoassay and radioimmunoassay related methods. Serum levels of Tg were elevated in 58.6%, those of CA-M26 in 15.7%, CA 19-9 in 5.3%, CT in 3.6%, NSE in 3.6%, CA 15-3 in 2.6%, CA 125 in 2.6%, CEA in 0.9%, CA-M 29 in 0%, ferritin in 0%, SCC in 0% and AFP in 0% of cases. Among the patients, there was a case of thyroid carcinoma secreting thyroglobulin and CA 19-9, both of whose titer decreased after surgery. Immunohistochemical studies were carried out on 57 of the above mentioned patients plus 6 anaplastic carcinomas, 15 adenomas, 5 adenomatous goiters, 6 Hashimoto's thyroiditis, 15 Graves' disease and 15 normal subjects. CA 19-9 was positive in 58% of the papillary carcinomas, EGF in 73% of papillary carcinomas, 67% of anaplastic carcinomas, and 33% of follicular carcinomas, while EGF-R was found in 73% of the papillary carcinomas, and 33% of the follicular carcinomas. Enhanced expression of ras p 21 oncogene and (c-myc oncogene) was demonstrated in 100% (100%) of anaplastic carcinomas, in 100% (67%) of follicular carcinomas and in 63% (90%) of papillary carcinomas. Our results indicate that a better tumor marker is required and more extensive molecular oncology research should be pursued.
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PMID:Tumor markers and oncogene expression in thyroid cancer using biochemical and immunohistochemical studies. 169 52

To study the histogenesis of and determine the most useful markers for diagnosing anaplastic thyroid carcinoma (ATC), 32 cases, including 2 with numerous osteoclast-like cells, were stained with a battery of antibodies to epithelial (keratin, epithelial membrane antigen [EMA], carcinoembryonic antigen [CEA]), mesenchymal (vimentin, desmin, muscle-specific actin [MSA], Factor VIII-related antigen [FVIII:RAg]), endocrine (thyroglobulin, calcitonin, chromogranin [Cg]), lymphocytic (leukocyte common antigen [LCA]), histiocytic (alpha-1-antitrypsin [alpha 1AT], alpha-1-antichymotrypsin [alpha 1AChy], KP1), melanocytic (HMB-45), and Schwann cell (S-100 protein) markers. Five tumors were associated with papillary carcinoma. In one of these cases, a morphologic continuum between the well-differentiated carcinoma and the ATC was visualized by their positive immunostaining for both vimentin and keratin, thus supporting the hypothesis that the latter tumor originated from the former. Twenty-five (78.1%) tumors expressed keratin, 10 (31.3%) reacted for EMA, and 3 (9.4%) expressed CEA, confirming the epithelial nature of this neoplasm. Reactivity for thyroglobulin was seen in a small number of cells in five (15.6%) thyroglobulin was seen in a small number of cells in five (15.6%) ATCs. Because all of the cases that expressed keratin also stained positively for EMA, CEA, or thyroglobulin, it is believed that keratin is the most useful epithelial marker for diagnosis of ATC. A lack of reactivity for calcitonin and Cg indicates that these tumors are not derived from C cells, as has been proposed by some authors. Reactivity for KP1 (CD68), a monoclonal antibody that reacts with a macrophage-associated antigen, occurred in the osteoclast-like cells but not in the anaplastic tumor cells. This finding, together with negative keratin staining of the osteoclast-like cells, indicates that these cells are not epithelial in nature and therefore should be considered reactive rather than neoplastic. Thirty tumors (93.8%) expressed vimentin, 15 (46.9%) marked for alpha 1AChy, 11 (34.4%) exhibited alpha 1AT, and 11 (34.4%) expressed S-100 protein. Because all of these markers can be seen in a wide variety of tumors of different histogeneses, they have no value in the diagnosis of ATC. Although immunostaining for FVIII:RAg, desmin, and MSA was negative in all of these tumors, these markers can help to differentiate between ATCs and some soft tissue sarcomas with which they can be confused.
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PMID:Anaplastic thyroid carcinoma. Immunocytochemical study of 32 cases. 171 40

Fifty-seven patients with thyroid tumours, 11 malignant lymphomas, 12 follicular, eight papillary and 26 medullary carcinomas, were studied. HE stained sections and immunocytochemical reactions with mono- and polyclonal antibodies were evaluated. The usefulness of thyroglobulin staining in differential diagnosis of infiltrations and metastases was stressed. The group of medullary carcinomas was morphologically polymorphic and presented unexpected patterns of immunoreactivity. Recent embryological findings were discussed providing better understanding of this group of carcinomas. The presence of thyroglobulin, along with other markers in areas of medullary carcinoma in polymorphic tumours, and the presence of neuro-endocrine markers in areas of follicular or papillary differentiation seem to be concordant with the theory of a pluripotential cell, derived from neural crest and capable of differentiation into a variety of forms.
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PMID:Differential diagnosis of thyroid tumours. An immunocytochemical study. 174 12

Human thyrotropin (TSH) receptor steady-state transcript levels were analyzed by Northern blot analysis in thyroids of patients with thyroid carcinoma, with hyperfunctioning adenoma and in normal controls. In control tissue and benign tumors expression levels of TSH receptor mRNA were high whereas in anaplastic carcinomas no normal TSH receptor mRNA was detected. In papillary and follicular tumors it varied from normal to markedly reduced levels. Thyroid peroxidase (TPO) and thyroglobulin (Tg) mRNA were strongly expressed in normal tissue and in hyperfunctioning adenomas but were completely lost in all anaplastic tumors. In papillary tumors expression of TPO and Tg mRNA varied from normal to a complete loss of expression of either TPO, Tg or both. Tg and TPO steady-state expression did not correlate to TSH receptor transcript levels. C-myc mRNA was highly expressed in anaplastic carcinomas, very variable in normal controls and in differentiated thyroid tumors and low in hyperfunctioning adenomas. In summary, TSH receptor mRNA is persistently expressed in all differentiated thyroid tissues and tumors but lost in undifferentiated carcinomas. Its persistence far along the transformation pathway further supports the concept that this gene which inserts the thyrocytes in the physiological regulatory network is almost constitutively expressed in this cell.
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PMID:Human thyrotropin receptor gene: expression in thyroid tumors and correlation to markers of thyroid differentiation and dedifferentiation. 176 Nov 61

In 62 patients with thyroid carcinoma 79 MRI bone marrow examinations and 48 bone marrow scintigraphies were recorded before or following radioiodine therapy, to study the extent of bone marrow expansion. The results of both methods were the same. In 34/79 investigations normal findings were seen, in 18 the bone marrow expanded to the middle third and in 26 to the distal third of the femur. One patient showed bone marrow expansion to the tibia. These results were compared with the following data: histology of tumor, TNM-staging, time passed since thyroidectomy, accumulated doses of radioiodine therapy, results of 131I scintigraphy, hematological changes, thyroglobulin level, age and sex. No significant correlations were found between these and the bone marrow imaging results. Bone marrow changes in patients before radioiodine therapy were similar to those in patients treated with up to 48 GBq 131I. Blind biopsy of the posterior iliac crest in five patients showed slightly pathological reactive changes. In only 2/17 follow-up studies an increase of bone marrow expansion was seen. In 8 patients localized findings indicating malignant infiltration were observed. In 4/8 patients metastases of thyroid carcinoma were known or confirmed by pathological radioiodine uptake and in 2/8 metastatic involvement was assumed because of an increased thyroglobulin level.
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PMID:[Bone marrow changes in patients with thyroid carcinoma]. 178 Feb 40

The biochemical properties of serum thyroglobulin obtained from six patients with follicular carcinoma of the thyroid and distant metastases to bone(s) have been studied. Since it is difficult to isolate sufficient thyroglobulin from serum samples, in vivo radioiodinated serum thyroglobulin obtained after radioiodine administration was used. In contrast to a sharp salting-out pattern observed with native thyroglobulin isolated from normal thyroid tissue, a broad salting-out curve was seen with metastatic serum thyroglobulin. The metastatic serum thyroglobulin eluted with low ionic strength from ion-exchange column. More than 95% of metastatic serum thyroglobulin could be bound to concanavalin-A sepharose and be eluted with 0.5 M alpha-methyl mannoside. The reactivity of metastatic serum thyroglobulin and native thyroglobulin towards concanavalin-A was comparable. Both types of thyroglobulins showed identical mobilities on sucrose linear density gradient centrifugation. The metastatic serum thyroglobulin from follicular carcinoma of the thyroid thus appears to be 19 S thyroglobulin with near normal concanavalin-A binding sugars but altered surface charges.
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PMID:Biochemical characterization of serum thyroglobulin from patients with bone metastases from follicular carcinoma of the thyroid. 178 70

We have compared two "markers" in the follow up of post treatment (surgery and therapeutical use of I-131) differentiated thyroid carcinoma. In 153 patients, thyroglobulin (Tg) serum levels were measured after withdrawal of I-thyroxine therapy, before performing a whole-body scan (WBS) with iodine-131; in 55 of these patients, Tg was measured again after at least 45 days of I-thyroxine treatment. The patients were followed between 3 and 10 years, and there were 2713 matched studies. Our results indicate for both parameters, false positive and negative values; sensitivity (SE) for WBS was 89% and specificity (SP) 83%; Tg presents a SE of 86% and SP of 83%. Matching both parameters, SE was 95% and SP 98%. The causes of false results are discussed. Tg determinations under I-thyroxine treatment do not permit the establishment of absence of illness; 37.7% of patients with demonstrated metastases or relapse showed negative Tg values that reached pathological values after suspension of I-thyroxine treatment; another 41.4% with elevated Tg values under therapy reached these values after suspension of I-thyroxine. Both markers, when utilized at the same time, offer the best possibilities in the follow-up of differentiated thyroid carcinoma, when determinations are carried out after suspension of hormonal treatment.
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PMID:[Serum thyroglobulin and whole-body scanning as markers in the follow-up of differentiated thyroid carcinomas]. 182 16


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