68 Ga-DOTANOC PET/CT in 2 Siblings With Von Hippel-Lindau Disease.

ABSTRACT: Von Hippel-Lindau disease is a rare multisystem disorder that shows autosomal dominant inheritance. It is a cancer syndrome that is characterized by the development of a variety of benign and malignant tumors-CNS hemangioblastomas, retinal angiomas, endolymphatic sac tumors, renal cysts and tumors, pancreatic cysts and tumors, adrenal pheochromocytomas, and epididymal cystadenomas. Here we present the 68 Ga-labeled DOTANOC scans of 2 siblings who show an interesting spectrum of findings consistent with Von Hippel-Lindau disease.

Tc-99m Ethambutol Scintigraphy with Single-Photon Emission Computed Tomography in Diagnosis of Tubercular Iliopsoas Abscess.

Very few imaging techniques can demonstrate the presence of Mycobacterium tuberculosis in vivo. Technitium-99m Ethambutol scintigraphy is one of them, although literature on the utility of this technique is scarce. We describe a patient with iliopsoas abscess showing increased uptake on Tc-99 m ethambutol scintigraphy which was later confirmed to be tubercular by the microbiological analysis of pus.

A Case of Metachronous Triple Carcinoma with Synchronous Double Primary Carcinoma on 18F-Fluorodeoxyglucose Positron Emission Tomography-Computed Tomography.

Multiple primary malignancies in a single patient are exceedingly rare, but their prevalence has increased in recent decades due to prolonged survival rates supported by the advent of newer and better generation of chemotherapeutic agents as well as advances in cancer detectability facilitated by sophisticated modalities such as positron emission tomography-computed tomography. Here, we discuss a case of a 66-year-old male who recovered completely from lung carcinoma but subsequently developed synchronous gall bladder and gastric carcinoma after 1 year.

Low-Grade Thymoma with Osseous and Pulmonary Metastases: Role of 18F-Fluorodeoxyglucose Positron Emission Tomography-Computed Tomography in Initial Staging.

Thymomas are rare anterior mediastinal tumors that originate in the epithelial cells of the thymus and have a rare propensity to metastasize to extrathoracic locations unless it is a histologic high-grade neoplasm (type B and above). We describe a case of 50-year-old woman diagnosed with type AB thymoma and the role of 18F-fluorodeoxyglucose positron emission tomography-computed tomography in accurate delineation of extrathoracic metastases during initial staging.

Adrenocortical Carcinoma with Inferior Vena Cava Thrombus on 18F-FDG-PET-Computed Tomography.

Adrenocortical carcinoma (ACC) is a rare and highly aggressive malignant neoplasm which can produce intravascular extension into the inferior vena cava (IVC) and can rarely extend into the right atrium. We describe the 18F Fluorodeoxyglucose Positron Emission Tomography-Computed Tomography findings of a 57-year-old man diagnosed with ACC with IVC thrombus extending up to the right atrium.

SMARCB1 (INI1)-deficient thyroid carcinoma: A novel entity expanding the spectrum of tumors with INI1 loss.

BACKGROUND: Biallelic loss of SMARCB1/INI1 is associated with highly aggressive malignancies, namely renal and extra-renal malignant rhabdoid tumors, and atypical teratoid/ rhabdoid tumor. Increasing availability of molecular testing and immunohistochemical stains acting as surrogate tools to genetic analysis has led to an increasing recognition of SMARCB1 loss in a variety of neoplasms. Interestingly, many of these lack the typical rhabdoid features ascribed to this group of tumors, making their identification difficult. CASE PRESENTATION: We describe the cytological, histological, immunohistochemical and molecular features of the first case of primary SMARCB1 (INI1)-deficient carcinoma of the thyroid gland in literature. The tumor was unique in various aspects; apart from never having been documented at this location, it showed extensive glandular differentiation, mimicking metastatic adenocarcinoma. CONCLUSION: Awareness of this novel entity is essential to avoid misdiagnosis, and for appropriate management, especially in an era of increased feasibility of targeted therapy.

Elastofibroma Dorsi: Findings on 18F-Fluorodeoxyglucose Positron Emission Tomography-Computed Tomography.

Elastofibroma dorsi (EFD) is a relatively rare soft-tissue pseudotumor that arises from mesenchymal tissue. We present a case of 48-year-old woman who underwent 18F fluorodeoxyglucose (FDG) positron emission tomography-computed tomography for initial staging of suspected carcinoma of the left breast. Incidental detection of soft-tissue masses showing moderate FDG uptake was seen in the bilateral infrascapular location characteristic of EFD.

Calcitonin-Negative Neuroendocrine Tumor of the Thyroid on 68Ga DOTANOC PET-CT.

Neuroendocrine tumors (NETs) of the thyroid gland are generally considered to be derived from parafollicular endocrine or C cells and are known as medullary thyroid carcinomas. Non-calcitonin-producing NETs of the thyroid are extremely rare in occurrence and pose a significant diagnostic dilemma for the physician and pathologist. We describe a case of a 58-year-old woman who was diagnosed as having primary NET thyroid with normal calcitonin levels and Ga DOTANOC PET-CT scan findings which were done for initial extent evaluation of the disease.