Positron Emission tomography Response Criteria In Solid Tumors (PERCIST) version 1.0 was introduced in 2009 for objective assessment of tumor metabolic response using ¹⁸F-FDG PET/CT. Practical PERCIST: A Simplified Guide to PET Response Criteria in Solid Tumors 1.0 was published in 2016 to review and clarify some of the issues with the PERCIST. In this article, we reflect on the benefits and challenges of implementing PERCIST, and speculate on topics that could be discussed in PERCIST 1.1 in the future.
Positron-Emission Tomography ; Positron-Emission Tomography and Computed Tomography

Positron Emission tomography Response Criteria In Solid Tumors (PERCIST) version 1.0 was introduced in 2009 for objective assessment of tumor metabolic response using ¹⁸F-FDG PET/CT. Practical PERCIST: A Simplified Guide to PET Response Criteria in Solid Tumors 1.0 was published in 2016 to review and clarify some of the issues with the PERCIST. In this article, we reflect on the benefits and challenges of implementing PERCIST, and speculate on topics that could be discussed in PERCIST 1.1 in the future.

Simple bone cyst (SBC) is very rare in adult ribs. The diagnosis basically relies on conventional radiography and occasionally on CT. There has been no earlier publication on PET/CT diagnosis of SBC. We report a case of adult costal SBC diagnosed by positive 18F-fluorodeoxyglucose (FDG) uptake. Histology showed the FDG uptake to be associated with reactive woven bone formation and nonspecific chronic inflammation. Correlation of PET, CT, plain radiography and sonography are also described.
Adult ; Bone Cysts ; Fluorodeoxyglucose F18 ; Humans ; Inflammation ; Osteogenesis ; Publications ; Ribs

No abstract available.
Candida* ; Esophagitis*

No abstract available.
Magnetic Resonance Imaging ; Pulmonary Artery ; Pulmonary Embolism* ; Radionuclide Imaging

No abstract available.
Erythroblastosis, Fetal* ; Infant, Newborn

PURPOSE: To date, anatomical imaging modalities of the pelvis and tumor markers have been the mainstay of surveillance for recurrent ovary cancer. This study aimed to assess the role of 18F-FDG PET/CT in evaluation of ovary cancer recurrences, especially in comparison with enhanced CT and tumor marker CA 125. Materials and METHODS: 73 patients who had PET/CT scan for restaging of confirmed ovary cancer, and additional imaging with enhanced CT of the pelvis within one month were included. CA 125 level was available in all patients. From the PET/CT images, maximum standard uptake values (SUVmax) of suspected recurrence sites were recorded. Confirmation was available through re-operation or biopsy in 26 cases, and clinical assessment with series of follow-up images in 47. RESULTS: PET/CT had 93% sensitivity and 88% specificity for detecting recurrent ovary cancer. Enhanced CT of pelvis had sensitivity and specificity of 83% and 88%, and CA 125 50% and 95%. CONCLUSION: PET/CT has higher sensitivity for detecting recurrent ovary cancer compared to enhanced CT though the differences were not significant. PET/CT has significantly higher sensitivity than CA 125. However, the three tests all agreed in only 43% of the recurrence cases, and recurrence should be suspected when any of the tests, especially PET/CT, show positive findings.
Biopsy ; Female ; Fluorodeoxyglucose F18 ; Follow-Up Studies ; Humans ; Ovarian Neoplasms ; Ovary ; Pelvis ; Recurrence ; Sensitivity and Specificity ; Biomarkers, Tumor

BACKGROUND: The useful tools for early diagnosis and diagnostic criteria need to be developed for controlling invasive aspergillosis (IA) which causes life-threatening conditions in high risk group such as immunocompromised hematology-oncology patients.METHODS: 103 cases of suspected IA on the ground of pathologic or Aspergillus Galactomannan (AG) test from March 2006 to March 2011 were reviewed. The patients with IA was classified into 4 groups 'Proven', 'Probable', ('Probable-1'), 'Possible' and 'Non' based on the criteria of European Organization for Research and Treatment of Cancer/Mycoses study Group (EORT/MSG) 2008 (and 2002).RESULTS: Of the 103 patients who underwent AG test, 16 cases were diagnosed as IA; 2 'Proven', 9 'Probable', 5 'Probable-1' and 4 'non' (false-positive). Underlying diseases were acute lymphoblastic leukemia (N=8), acute myeloid leukemia (N=5), severe aplastic anemia (N=4), neuroblastoma (N=2) and non-Hodgkin lymphoma (N=1). Risk factors were severe neutropenia for 10 days (80%), prolonged use of steroid (70%), receipt of an allogeneic stem cell transplant (45%) and treatment with immunosuppressants (40%). Major involved organs of IA were lung (N=15) and sinus (N=1). Overall sensitivity, specificity, positive predictive value and negative predictive value of the AG test were 94%, 95%, 79% and 99%, respectively. The mortality of 16 patients with IA was 50%.CONCLUSION: A combined use of the AG test and modified criteria of EORT/MSG 2008 allows not only early diagnosis but also prompt classifying risk groups of IA so that proper antifungal agents were used in pediatric hematology-oncology patients.
Anemia, Aplastic ; Antifungal Agents ; Aspergillosis ; Aspergillus ; Early Diagnosis ; Hematology ; Humans ; Immunosuppressive Agents ; Leukemia, Myeloid, Acute ; Lung ; Lymphoma, Non-Hodgkin ; Mannans ; Neuroblastoma ; Neutropenia ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; Risk Factors ; Sensitivity and Specificity ; Stem Cells ; Transplants

BACKGROUND: Reactivation of the polyomavirus and the use of conditioning regimen may be the causes of hemorrhagic cystitis (HC) following hematopoietic stem cell transplantation (HSCT). However, there are only a few reports on the clinical characteristics of viral reactivation in HC following HSCT in Korea, especially in pediatric population.METHODS: 51 patients who received HSCT in Ajou University Hospital from January 2006 to June 2012 were investigated retrospectively. 16 patients were diagnosed with HC following HSCT and were enrolled in this study. Confirmation of polyomavirus was done by polymerase chain reaction (PCR) method.RESULTS: Out of the 16 patients diagnosed with HC following HSCT, there were 5 early type HC patients and 11 late type HC patients. Positive PCR results for the BK virus (BKV) and the JC virus were found on 13 and 5 patients, respectively. 4 patients showed positive results for both viruses. For the late type HC, there were 10 patients with positive PCR results for the BKV. Cyclophosphamide was used in 33 patients, and 13 patients eventually developed HC. There was no statistical significance between the incidence of hematuria and the reactivation of the BKV or the conditioning regimens. Most patients were treated conservatively but 4 patients who showed severe hematuria or poor general condition received intravenous cidofovir. After the infusion of cidofovir, hematuria disappeared on average of 65 days and the BKV was undetectable on average of 53 days.CONCLUSION: In our study, activation of the BKV was common in patients who were diagnosed with HC following HSCT. All patients recovered from HC with conservative management and the BKV became undetectable in the majority of patients who were treated with intravenous cidofovir.
BK Virus ; Cyclophosphamide ; Cystitis ; Cytosine ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells ; Hematuria ; Humans ; Incidence ; JC Virus ; Korea ; Organophosphonates ; Polymerase Chain Reaction ; Polyomavirus ; Retrospective Studies

BACKGROUND AND OBJECTIVES: Benign paroxysmal positional vertigo (BPPV) is one of the critical life events that can affect physical, emotional, and functional aspects of quality of life. Canalith repositioning procedure (CRP) provides rapid and long lasting relief of symptoms in most patients with BPPV. However, some patients express nonspecific symptoms such as anxiety or discomfort after treatment, The purpose of this study was to assess the residual symptoms after CRP in patients with BPPV using Dizziness Handicap Inventory (DHI) in a questionnaire format and to evaluate the therapeutic efficacy of CRP according to accompanying the DizzyFIX device. MATERIALS AND METHODS: We performed a prospective investigation in 135 consecutive patients with confirmed posterior semicircular canal BPPV. CRP was performed until nystagmus and vertigo disappeared. Patients were divided into three group using the DizzyFIX (group A), not using the DizzyFIX (group B) and closed observation (group C) after treatment. Then patients were asked to complete the questionnaire for Korean form DHI before treatment, 1, 2, 3, 4, and 8 week after treatment. RESULTS: There was a significant improvement in DHI scores when comparing the pre CRP and post CRP three groups (p<0.05), although emotional items showed incomplete improvement at 1 week. But at 2 week after treatment, there were statistically significant differences between group A and other groups in DHI scores specially in emotional items. CONCLUSION: Even after successful CRP, DHI scores indicated incomplete recovery and residual subjective symptoms may remain. For these patients additional follow up and management are necessary and using of the DizzyFIX will be helpful to reduce the incidence of residual dizziness especially emotional aspect.
Anxiety ; Dizziness ; Follow-Up Studies ; Humans ; Incidence ; Prospective Studies ; Quality of Life ; Surveys and Questionnaires ; Semicircular Canals ; Vertigo