ABSTRACT
Background: Tumour thrombus of the facial vein is an exceedingly rare complication arising from mucoepidermoid carcinoma of the salivary glands. Early detection is pivotal for appropriate management, as delays can lead to metastatic disease, worsening the prognosis. Case description: We present a case involving a 76-year-old male with a history of mucoepidermoid carcinoma of the right submandibular gland, previously treated with surgical resection and radiotherapy. The patient, a long-term worker in a rubber factory, presented with a painless, firm swelling in the right cheek, persisting for three months. Contrast-enhanced computed tomography (CECT) showed distended facial vein with enhancing thrombus confirmed by sonographic correlation demonstrating intralesional vascularity. Cannon ball pulmonary nodules were also noted. Radiological findings led to a core biopsy, confirming tumor thrombosis of the facial vein due to mucoepidermoid carcinoma. However, the patient declined a biopsy of the pulmonary nodules, and has been referred to oncology for further management. Conclusions: This case highlights the critical importance of considering venous tumour thrombus in patients with previous salivary gland malignancies presenting with new or persistent facial swellings. It emphasises the role of advanced imaging techniques in the early identification of this rare entity. Additionally, it stresses the need for healthcare providers to engage in thorough discussions with patients about the potential consequences of forgoing recommended treatments, reinforcing the need for vigilance in monitoring such patients. LEARNING POINTS: Tumours of head and neck may cause thrombosis of veins by direct invasion resulting in a tumour thrombus, or indirectly by exerting a mass effect and vein compression.These can be distinguished by contrast-enhanced computed tomography (CECT) or magnetic resonance imaging (MRI).Doppler ultrasound may show patchy neovascularisation in a tumour thrombus, which would be absent if thrombosis was caused by compression.
ABSTRACT
Synovial sarcomas most commonly arise in the para-articular locations of the extremities, such as the upper limbs, thigh, knee, ankle, and foot. Thoracic synovial sarcomas are a rare entity that can arise in the chest wall, pleura, lung, heart, or mediastinum. We present a case of a 23-year-old female with a complaint of swelling of the left breast. Examination demonstrated an enlarged left breast and a hard-fixed swelling without overlying skin changes or nipple retraction. Ultrasound showed a well-defined, solid-appearing lesion deep in the left breast parenchyma, which was adherent to the underlying left chest wall musculature and seemed to be displacing the breast parenchyma anteriorly. Contrast-enhanced computed tomography (CECT) and magnetic resonance imaging (MRI) confirmed the lesion centered at the left pectoralis major and minor muscles, confirming the chest wall's origin. Histopathology findings favored monophasic synovial sarcoma.
ABSTRACT
Pituitary stalk interruption syndrome is a triad of thin (<1 mm) or complete absence of the pituitary stalk with either an aplastic or ectopic posterior lobe of the pituitary gland and a hypoplastic or absent anterior lobe of the pituitary. Patients present with growth retardation, short height, seizures, intellectual disability, and absence of sexual maturation at the expected time. Here, we presented a case of a 12-year-old male with stunted growth. Upon examination, there was reduced height, more than 3 standard deviations below the average for his chronological age. Laboratory results showed reduced levels of growth hormone and thyrotropin. Dual-energy X-ray absorptiometry revealed osteoporosis, while an X-ray of the wrist for bone age corresponded to seven years. MRI imaging confirmed the classical triad of findings for pituitary stalk interruption syndrome. Consequently, the patient was referred back to the endocrinology clinic for further management.
ABSTRACT
A rare cause of metallic artifacts over the scalp on magnetic resonance imaging (MRI) is welding fume particles that contain paramagnetic iron oxide particles. These introduce distortion of the magnetic field homogeneity and result in susceptibility artifacts. They may erroneously be reported as a pathology such as calcified lesions; therefore, awareness among radiologists is required. We report a case of a 52-year-old male, an industrial inspector by profession, who presented to the neurology clinic with headaches for which an MRI of the brain without contrast was advised. There was no brain parenchymal signal abnormality; however, numerous small rounded altered signal foci were identified along the scalp, especially in the vertex region, which returned central hypointense and marginal hyperintense signal on all sequences. The imaging signals were suspicious for calcified scalp lesions, and the patient was recalled for clinical examination, which was unremarkable for cutaneous or subcutaneous abnormality on the scalp or elsewhere over the body. A detailed history was taken retrospectively, revealing that the patient had walked through a room where welding was being done before presenting for an MRI exam, without taking a shower. The various altered signal foci over the scalp on MRI based on their shape were hence identified as welding fume particles. These were fine enough not to be visible by the naked eye but determined by the MRI machine because of their magnetic susceptibility artifact. We aim to increase radiologists' awareness of such artifacts that may be seen in patients with occupational exposure to these particles to avoid misdiagnosis of other pathologies.