Metastatic PSMA avid prostate tumour with penile uptake; a rare metastatic site on PET-CT.

Prostate carcinoma is the most common malignancy in males and the second most common cause of mortality. Initially, metastatic prostate cancers tend to involve bones, but these tumours can involve any system. Gallium-68 prostate specific membrane antigen (PSMA) positron emission computed tomography (PET-CT) scan is indicated in prostate cancer patients if PSA levels are raised, and CT and bone scans are inconclusive. Metastatic penile involvement is a rare phenomenon. We present a case of prostate cancer with foci of PSMA uptake in the penile region. .

Rapidly growing massive abdominal sarcomatoid carcinoma on F18-FDG PET-CT scan.

Sarcomatoid carcinoma is a rare type of tumour and most commonly arises in the lungs. However, rarely can it also be found in the abdomen. Sarcomatoid tumours are aggressive with large tumoural volume showing cancerous epithelial cells mixed with sarcomatous (nerve, muscle, fat etc.) features on histopathology. Most of the carcinosarcomas arise in the background of pleomorphic adenoma, originating from a myoepithelial precursor. These tumours are resistant to treatment and rapidly metastasize. We present a unique case of hepatocellular sarcomatoid sarcoma, evaluated through F18-FDG PET/CT.

Clinical Significance Of Dermal Backflow On Lymphoscintigraphy In Patients With Lower Limb Edema.

Chronic blockage of the lymphatic system due to functional or anatomical causes results in lymphoedema which results in swelling due to accumulation of lymphatic fluid in the soft tissue. Lymphoedema commonly affects the upper and lower limbs but may be seen in the neck, chest wall, abdomen and genitalia. Lymphoscintigraphy is non-invasive and maps the lymphatic channels thereby indicating location of blockage along the lymphatic pathways. Blockage of lymphatic channels may lead to back pressure resulting in dermal backflow. We present a case of dermal backflow in bilateral lymphoedema.

Seeding in the walnut; Leptomeningeal spread of Breast Cancer.

Breast cancer is the most common etiology of leptomeningeal carcinomatosis (LC), with or without brain parenchymal involvement. However, only 5% of patients with breast cancer develop leptomeningeal metastasis even in late clinical course. It can rarely be detected on bone scintigraphy. MRI is the modality of choice.