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The author presents 3 incidental cases of glomangiopericytoma exhibiting avidity of 99mTc-MIBI, 18F-FDG, and 11C-choline, respectively, during SPECT/CT evaluation of hyperparathyroidism, and PET/CT monitoring of metastatic melanoma and biochemical recurrence of prostate cancer. All the 3 cases show similar functional and anatomic features of tracer-avid lesion in the right nasal cavity from histologically proven glomangiopericytoma.
The author presents 3 incidental cases of glomangiopericytoma exhibiting avidity of 99mTc-MIBI, 18F-FDG, and 11C-choline, respectively, during SPECT/CT evaluation of hyperparathyroidism, and PET/CT monitoring of metastatic melanoma and biochemical recurrence of prostate cancer. All the 3 cases show similar functional and anatomic features of tracer-avid lesion in the right nasal cavity from histologically proven glomangiopericytoma.
Carcinoma of breast with neuroendocrine differentiation is an extremely rare entity, especially in male population. Although the "garden variety" of male breast cancers is often metastatic at presentation, with an aggressive course, there is hardly any literature about neuroendocrine variants. We report a case of a 57-year-old man who had pituitary symptoms, which on 68Ga-DOTANOC PET/CT imaging turned out to be a metastatic lesion, with somatostatin expressing primary in breast and other sites, with histopathological confirmation of neuroendocrine differentiation in breast cancer.
Carcinoma of breast with neuroendocrine differentiation is an extremely rare entity, especially in male population. Although the "garden variety" of male breast cancers is often metastatic at presentation, with an aggressive course, there is hardly any literature about neuroendocrine variants. We report a case of a 57-year-old man who had pituitary symptoms, which on 68Ga-DOTANOC PET/CT imaging turned out to be a metastatic lesion, with somatostatin expressing primary in breast and other sites, with histopathological confirmation of neuroendocrine differentiation in breast cancer.
We report a 64-year-old woman whose history started with urinary incontinence and neurological symptoms (cognitive impairment, dysarthria, and gait difficulties). The 18F-FDG PET/CT showed hypometabolism of the whole cerebellum. Then 6 months later, she developed tremor, postural instability, and ataxia, so she was hospitalized to complete study. Blood tests (antibodies, vitamin B12, copper, genetic test of spinocerebellar ataxia) did not have alterations, but imaging studies, along with clinical symptoms, provide the diagnosis of possible multiple system atrophy.
We report a 64-year-old woman whose history started with urinary incontinence and neurological symptoms (cognitive impairment, dysarthria, and gait difficulties). The 18F-FDG PET/CT showed hypometabolism of the whole cerebellum. Then 6 months later, she developed tremor, postural instability, and ataxia, so she was hospitalized to complete study. Blood tests (antibodies, vitamin B12, copper, genetic test of spinocerebellar ataxia) did not have alterations, but imaging studies, along with clinical symptoms, provide the diagnosis of possible multiple system atrophy.
We evaluated the reliability of 18F-FDG PET imaging biomarkers to classify early response status across observers, scanners, and reconstruction algorithms in support of biologically adaptive radiation therapy for locally advanced non-small cell lung cancer.

Thirty-one patients with unresectable locally advanced non-small cell lung cancer were prospectively enrolled on a phase 2 trial (NCT02773238) and underwent 18F-FDG PET on GE Discovery STE (DSTE) or GE Discovery MI (DMI) PET/CT systems at baseline and during the third week external beam radiation therapy regimens. All PET scans were reconstructed using OSEM; GE-DMI scans were also reconstructed with BSREM-TOF (block sequential regularized expectation maximization reconstruction algorithm incorporating time of flight). Primary tumors were contoured by 3 observers using semiautomatic gradient-based segmentation. SUVmax, SUVmean, SUVpeak, MTV (metabolic tumor volume), and total lesion glycolysis were correlated with midtherapy multidisciplinary clinical r therapy.
The variability FDG PET lesion contours and imaging biomarkers was relatively low across observers, scanners, and reconstructions. Objective midtreatment PET response assessment may lead to improved precision of biologically adaptive radiation therapy.
A 39-year-old man was diagnosed clinically with hemophagocytic syndrome, which was suspected to be secondary to a malignancy. Selleck GSK3 inhibitor Therefore, the patient underwent a 68Ga-FAPI PET/CT scan as part of an ongoing clinical trial (ChiCTR2100044131). Increased tracer uptake was noted the gluteal region. Medical history revealed recent iliac bone marrow aspiration on the same side. On further examination, the lesion was confirmed to be a hematoma. The present case highlights that puncture operations may result in intramuscular hematomas, which might potentially malignancy on a 68Ga-FAPI PET/CT.
A 39-year-old man was diagnosed clinically with hemophagocytic syndrome, which was suspected to be secondary to a malignancy. Therefore, the patient underwent a 68Ga-FAPI PET/CT scan as part of an ongoing clinical trial (ChiCTR2100044131). Increased tracer uptake was noted the gluteal region. Medical history revealed recent iliac bone marrow aspiration on the same side. On further examination, the lesion was confirmed to be a hematoma. The present case highlights that puncture operations may result in intramuscular hematomas, which might potentially malignancy on a 68Ga-FAPI PET/CT.
This study aimed to investigate the prognostic impact of metabolic heterogeneity (MH) in patients with multiple myeloma (MM).

We retrospectively analyzed MH with 18F-FDG PET/CT in 203 patients with newly diagnosed MM. Metabolic heterogeneity was estimated using the area under the curve of the cumulative SUV volume histogram. To evaluate MH, we selected 2 lesions "MH-SUVmax," a lesion with SUVmax, and "MH-metabolic tumor volume (MTV)," a lesion with the largest MTV.

Metabolic heterogeneity from an MH-SUVmax lesion showed more prognostic relevance than that from a lesion with the largest MTV. The progression-free survival (PFS) and overall survival (OS) rates were significantly lower in the high-MH-SUVmax group than in the low-MH-SUVmax group (median PFS 25.2 vs 33.9 months; median OS 41.6 vs 112.0 months; P = 0.004 and 0.046, respectively), whereas high MH-SUVmax retained independent prognostic power on multivariate analysis. Even among patients with high whole-body MTV, those with high MH-SUVmax tended to show poorer prognosis than those without (median PFS, 23.
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