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8 vs 30.2 months; P = 0.085). Moreover, patients with high MH-SUVmax and high-risk cytogenetic abnormalities showed dismal outcomes even with standard treatment (median PFS and OS, 10.0 and 33.3 months, respectively).<br /><br /> Our results suggested that high MH-SUVmax based on pretreatment with 18F-FDG PET/CT is a novel prognostic factor for cases of MM.<br /><br />Our results suggested that high MH-SUVmax based on pretreatment with 18F-FDG PET/CT is a novel prognostic factor for cases of MM.<br /><br /> Schaaf-Yang syndrome is a genetic disorder characterized by delayed psychomotor development, hypotonia, intellectual disability, feeding difficulties, and variable dysmorphic facial features. It is an extremely rare disorder with over 250 cases reported in the medical literature. This condition has been determined to be inherited by an autosomal dominant pattern. We present colon transit scintigraphy of a 6-year-old boy with history of chronic constipation with poor response to medical treatment, clinical characteristics, and gene mutations consistent with this syndrome. After oral administration of 111In-DTPA, planar and SPECT/CT images showed rapid proximal colonic transit and anorectal retention.<br /><br />Schaaf-Yang syndrome is a genetic disorder characterized by delayed psychomotor development, hypotonia, intellectual disability, feeding difficulties, and variable dysmorphic facial features. It is an extremely rare disorder with over 250 cases reported in the medical literature. This condition has been determined to be inherited by an autosomal dominant pattern. We present colon transit scintigraphy of a 6-year-old boy with history of chronic constipation with poor response to medical treatment, clinical characteristics, and gene mutations consistent with this syndrome. After oral administration of 111In-DTPA, planar and SPECT/CT images showed rapid proximal colonic transit and anorectal retention.<br /><br /> A 64-year-old man was referred because of the right ureteral obstruction. CT urography showed an intraluminal enhancing mass in the right midureter and an enhancing nodule in the bladder wall. FDG PET/CT showed increased FDG uptake of the ureteral mass and an unexpected hypermetabolic lesion in the jejunum. The patient underwent transurethral resection of the bladder tumor, right laparoscopic nephroureterectomy, and partial enterectomy. Inverted urothelial papilloma of the bladder, high-grade urothelial carcinoma of the right ureter, and jejunal adenocarcinoma were confirmed by histopathology. Genetic testing of the jejunal adenocarcinoma revealed MSH2 germline mutation, confirming the diagnosis of Lynch syndrome.<br /><br />A 64-year-old man was referred because of the right ureteral obstruction. CT urography showed an intraluminal enhancing mass in the right midureter and an enhancing nodule in the bladder wall. FDG PET/CT showed increased FDG uptake of the ureteral mass and an unexpected hypermetabolic lesion in the jejunum. The patient underwent transurethral resection of the bladder tumor, right laparoscopic nephroureterectomy, and partial enterectomy. Inverted urothelial papilloma of the bladder, high-grade urothelial carcinoma of the right ureter, and jejunal adenocarcinoma were confirmed by histopathology. [https://www.selleckchem.com/products/amg510.html selleck products] Genetic testing of the jejunal adenocarcinoma revealed MSH2 germline mutation, confirming the diagnosis of Lynch syndrome.<br /><br /> 18F-PSMA is a promising tracer for both staging and detection of biochemical recurrence in prostate cancer. PSMA is also expressed in the endothelium of tumor-associated neovasculature of various solid malignancies possibly due to tumor-associated angiogenic factors and endothelial cell sprouting. We report a case of a 59-year-old man with known case of prostate cancer underwent 18F-PSMA for restaging. 18F-PSMA PET/CT shows multiple lytic bone lesions with high PSMA expression. Histopathological evaluation showed metastatic angiosarcoma. 18F-PSMA expression in the angiosarcoma can be potentially guided to radionuclide legend therapy.<br /><br />18F-PSMA is a promising tracer for both staging and detection of biochemical recurrence in prostate cancer. PSMA is also expressed in the endothelium of tumor-associated neovasculature of various solid malignancies possibly due to tumor-associated angiogenic factors and endothelial cell sprouting. We report a case of a 59-year-old man with known case of prostate cancer underwent 18F-PSMA for restaging. 18F-PSMA PET/CT shows multiple lytic bone lesions with high PSMA expression. Histopathological evaluation showed metastatic angiosarcoma. 18F-PSMA expression in the angiosarcoma can be potentially guided to radionuclide legend therapy.<br /><br /> We herein report a case involving a 67-year-old man with concomitant progressive follicular lymphoma and gastric carcinoma. Baseline 18F-FDG PET/CT showed high metabolic activity in multiple nodal stations and a thickened gastric antrum wall, whereas 68Ga-FAPI-04 PET/CT depicted very intense tracer uptake in the gastric lesion but mild uptake in the nodes. After the treatment, complete remission from lymphadenopathy was achieved, whereas the gastric lesion accumulated more radiotracers compared with baseline levels. Despite our incorrect initial assumption of B-cell transformation, molecular imaging was able to profile the characteristics of these 2 diseases.<br /><br />We herein report a case involving a 67-year-old man with concomitant progressive follicular lymphoma and gastric carcinoma. Baseline 18F-FDG PET/CT showed high metabolic activity in multiple nodal stations and a thickened gastric antrum wall, whereas 68Ga-FAPI-04 PET/CT depicted very intense tracer uptake in the gastric lesion but mild uptake in the nodes. After the treatment, complete remission from lymphadenopathy was achieved, whereas the gastric lesion accumulated more radiotracers compared with baseline levels. Despite our incorrect initial assumption of B-cell transformation, molecular imaging was able to profile the characteristics of these 2 diseases.<br /><br /> 68Ga-pentixafor PET/CT was reported to have a high sensitivity in detecting tumor involvement of Waldenström macroglobulinemia/lymphoplasmacytic lymphoma (WM/LPL) in our previous study. We aimed to further investigate its value in response assessment in WM/LPL.<br /><br /> Fifteen patients with WM/LPL were recruited in a prospective cohort study and underwent both 68Ga-pentixafor and 18F-FDG PET/CT at baseline and posttreatment. PET/CT-based responses were analyzed with visual assessments and compared with clinical response.<br /><br /> At baseline, all of the 15 patients had a positive 68Ga-pentixafor PET/CT scan, whereas 18F-FDG PET/CT was positive in 11/15 patients. After chemotherapy, the overall response rate was 86.7% (13/15), and 68Ga-pentixafor PET/CT showed different degree of tumor response from baseline in these patients. In the 2 patients with progressive disease, 68Ga-pentixafor PET/CT detected new lesions or remarkable increase of 68Ga-pentixafor uptake in tumor involvements. However, 18F-FDG PET/CT failed to detect the improvement of disease in 6/13 patients and missed disease progression in 1 of the 2 patients.