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Query: UMLS:C0677930 (primary tumor)
 20,210 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Both female adnexal tumor of possible wolffian origin (FATWO) and metastasis to the appendix from any primary tumor are extremely rare entities. The appendiceal metastasis from FATWO has not been reported, and there is a lack of the literature regarding FDG PET/CT study in both. We reported the case of an appendiceal metastasis from FATWO, demonstrated by F-18 FDG PET/CT. The case highlights the significance of FDG uptake in the appendix. When interpreting FDG PET/CT, caution should be exercised to identify uptake in the appendix, because it is easily misinterpreted as bowel activity.
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PMID:Metastatic female adnexal tumor of possible wolffian origin (FATWO) of the appendix demonstrated by FDG PET/CT: the first reported case. 2122 Sep 80

The value of (18)F-Fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) in the detection of carcinoma of unknown primary (CUP) differs among the studies. This study aimed to evaluate the role of (18)F-FDG PET/CT in CUP. Fifty-one patients (19 women, 32 men) with metastasis confirmed by histopathology from an unknown primary tumor were included in this study. Patients received 370 MBq of (18)F-FDG intravenously, and PET/CT was performed at 60 minutes after injection. Primary tumor sites were detected in 5 of 51 patients (9.6%): in 2 patients with carcinoma of the lung, in 1 patient with carcinoma of the gallbladder, in 1 patient with carcinoma of the esophagus, and in 1 patient with carcinoma of the stomach. No primary tumor was discovered in the remaining 46 patients (90.4%) during the follow-up. The sensitivity, specificity, and accuracy of (18)F-FDG PET/CT were 100%, 80.4%, and 82.4%. The positive and negative predictive values were 35.7 and 100%, respectively. Based on the data presented, (18)F-FDG PET/CT has a clinical implicative value in detecting the primary tumor of CUP. PET/CT can be useful to rule out the possibility of detecting the primary tumor during the follow-up.
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PMID:Clinical implication of (18)F-FDG PET/CT in carcinoma of unknown primary. 2127 63

A 71-year-old man with right lung mass, who was recently diagnosed histopathologically with pulmonary adenocarcinoma, was referred for staging of the primary tumor. Whole-body F-18 fluorodeoxyglucose positron emission tomography and computed tomography (FDG PET/CT) demonstrated multiple hypermetabolic foci in various skeletal muscle localizations, suggesting extensive metastatic muscle involvements in addition to increased FDG uptake in the primary tumor. Subsequent biopsy and histopathological study confirmed muscle metastasis from lung adenocarcinoma. Skeletal muscle metastasis from lung cancer is rare, but multiple muscle metastases are even more unusual. FDG PET/CT is able to detect unexpected metastatic involvements such as multiple muscle metastases in lung cancer patients.
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PMID:Multiple muscle metastases from lung cancer detected by FDG PET/CT. 2128 92

Molecular imaging with PET, and certainly integrated PET-CT, combining functional and anatomical imaging, has many potential advantages over anatomical imaging alone in the combined modality treatment of lung cancer. The aim of the current article is to review the available evidence regarding PET with FDG and other tracers in the combined modality treatment of locally advanced lung cancer. The following topics are addressed: tumor volume definition, outcome prediction and the added value of PET after therapy, and finally its clinical implications and future perspectives. The additional value of FDG-PET in defining the primary tumor volume has been established, mainly in regions with atelectasis or post-treatment effects. Selective nodal irradiation (SNI) of FDG-PET positive nodal stations is the preferred treatment in NSCLC, being safe and leading to decreased normal tissue exposure, providing opportunities for dose escalation. First results in SCLC show similar results. FDG-uptake on the pre-treatment PET scan is of prognostic value. Data on the value of pre-treatment FDG-uptake to predict response to combined modality treatment are conflicting, but the limited data regarding early metabolic response during treatment do show predictive value. The FDG response after radical treatment is of prognostic significance. FDG-PET in the follow-up has potential benefit in NSCLC, while data in SCLC are lacking. Radiotherapy boosting of radioresistant areas identified with FDG-PET is subject of current research. Tracers other than (18)FDG are promising for treatment response assessment and the visualization of intra-tumor heterogeneity, but more research is needed before they can be clinically implemented.
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PMID:Therapeutic implications of molecular imaging with PET in the combined modality treatment of lung cancer. 2132 Jul 56

Case 1:A 61-year-old man was diagnosed as cholangiocellular carcinoma with para-aortic lymph node metastasis (T4N1M0, cStage IV B). After 9 courses of chemotherapy using gemcitabine(GEM), CT scan showed that primary lesion and metastatic lymph nodes were reduced in size, and FDG-PET showed no FDG accumulation in the lymph nodes. The patient decided to continue additional chemotherapy with GEM and hyperthermia. Despite the chemo-hyperthermia, the primary tumor re-grew. He then underwent right trisegmentectomy, lymph node dissection, and reconstruction of the biliary tract. The final stage was T3N0M0, fStage III . Case 2: A 65-year-old man was diagnosed as cholangiocellular carcinoma with massive arterial invasion(T3N1M0, cStage IV B). After 3 courses of chemotherapy for GEM plus S-1, a CT scan revealed that the main tumor and metastatic lymph nodes were reduced in size, and he underwent extended left lobectomy of liver, lymph node dissection, and reconstruction of the biliary tract. The final stage was T1N0M0, fStage I . These cases indicated that neoadjuvant chemotherapy by gemcitabine was indeed promising for some cases of biliary tract cancer.
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PMID:[Two cases of curatively resected intrahepatic cholangiocellular carcinomas through effective response to neoadjuvant chemotherapy]. 2136 1

An unknown primary tumor (UPT) is defined by the presence of a metastatic cancer without a known primary site of origin despite a standardized diagnostic workup. Clinically, UPTs show rapid progression and early dissemination, with signs and symptoms related to the metastatic site. The molecular bases of their biology remain largely unknown, with no evidence as to whether they represent a distinct biological entity. Immunohistochemistry remain the best diagnostic tool in term of cost-effectiveness, but the time-consuming "algorithmic process" it relies on has led to the application of new molecular techniques for the identification of the primary site of UPTs. For example, several microarray or miRNA classifications of UPTs have been used, with an accuracy in the prediction of the primary site as high as 90%. It should be noted that validating a prediction of tissue origin is challenging in these patients, since most of them will never have a primary site identified. Moreover, prospective studies to determine whether selection of treatment options based on such profiling methods actually improves patient outcome are still missing. In the last few years functional imaging (i.e. FDG-PET/CT) has gained a main role in the detection of the site of origin of UPTs and is currently recommended by the European Association of Nuclear Medicine. However, despite recent refinements in the diagnostic workup, the site of origin of UPT often remains elusive. As a consequence, treatment of patients with UPT is still empirical and inadequate.
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PMID:Unknown primary tumors. 2137 31

Cervical lymphadenopathy is usually related to the presence of an inflammatory disease or to a malignant localization. In the event of metastatic findings, the thyroid gland is the most likely primary site of a tumor. Metastatic lymphadenopathy represents a challenge when the primary tumor is unknown. A 64-year-old female with a supraclavicular palpable mass in the absence of underlying thyroid disease underwent ultrasonography of the neck, biopsy of the pathological lymph node, fluorodeoxyglucose-Positron Emission Tomography (FDG-PET) and colonoscopy until right colon cancer was diagnosed. FDG-PET is a fast and reliable tool to discover the primary site of cervical masses of unknown origin.
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PMID:Positron emission tomography scan reveals an unusual source for cervical lymphadenopathy: right colon cancer. 2137 56

Primary umbilical neoplasm is very rare, even though there are scattered case reports about the umbilical metastases known as Sister Mary Joseph's nodules. A 51-year-old man presented with an umbilical mass. Surgical biopsy showed infiltrating neoplasm with glandular and focal papillary architecture. FDG PET/CT demonstrated a focus of abnormal uptake located in the umbilicus, without evidence of a primary tumor elsewhere. Further investigations with EGD, colonoscopy, and cystoscopy were all negative for a neoplasm. The whole-body FDG PET/CT is an ideal imaging modality for evaluation of an umbilical lesion, especially identification or exclusion of a primary neoplasm elsewhere.
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PMID:Primary umbilical neoplasm demonstrated on FDG PET/CT. 2163 46

A 35-year-old man underwent PET/CT scan to evaluate suspected osseous metastases from a presumed tumor of unknown origin. PET images demonstrated multiple foci of increased FDG uptake in all extremities, corresponding to the osseous destruction on the concurrent CT images. However, no primary tumor was identified. Instead, the bone lesions were subsequently proven due to syphilis infection.
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PMID:Syphilitic bone destruction on FDG PET/CT. 2163 78

A 41-year-old man who had non-small cell lung cancer invading his right 3rd, 4th and 5th ribs with hilum lymph node swelling(cT3N1M0, cStage III A), received chemoradiation therapy, cisplatin(CDDP)/docetaxel, and 2 Gy/Fr of irradiation prior to surgery. But the therapy was discontinued due to interstitial pneumonitis on day 24, during 28 Gy of radiation. At that time, a PET-CT scan revealed the accumulation of FDG in the primary tumor, hilar lymph node, and one of the ipsilateral axillar lymph nodes, in which cancer cell presence was proven by aspiration needle cytology. We organized a radical operation even though the node status was classified to cStage IV, because ipsilateral axillary lymph nodes may be regarded as regional nodes for tumors invading the chest wall. Right upper lobectomy and chest wall resection were performed, and the ipsilateral hilar, mediastinal, and axillary lymphnode were dissected. Pathological findings showed no active cancer cell in the primary lesion and hilar lymph nodes(Ef. 3), but obvious metastasis in one of the axillary lymph nodes(pT0N0M1b, pStage IV). The patient received adjuvant chemotherapy(CDDP/vinorelbine), and is alive and tumor-free 10months after the resection.
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PMID:[A radical resection of non-small cell lung cancer invading chest wall with ipsilateral axillary lymph node metastases]. 2167 93


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