Bilateral Facial Nerve Palsy in Acute B Cell Lymphoblastic Leukemia: A Case Report and Review of the Literature

The Double Bell's: Unraveling Idiopathic Bilateral Facial Paralysis in a 31-Year-Old

Bell's palsy, an acute, idiopathic, and typically unilateral facial nerve paralysis, represents a common cause of sudden facial weakness. The aetiology is often attributed to viral infections. This case report discusses the presentation, diagnosis, and management of a rare case of idiopathic bilateral Bell's palsy. We present a case of a 31-year-old male who presented to the emergency department with a one-week history of progressive bilateral facial weakness following initial neck and jaw pain. Despite the resolution of pain, the patient experienced complete facial paralysis on both sides, including the inability to raise eyebrows, close eyes fully, and numbness over the lips. The patient presented with no complaints of headache, trauma, vision changes, or recent travel history. Examination and routine blood tests yielded normal results, and a head CT scan showed no abnormalities. As a result, the diagnosis of idiopathic bilateral Bell's palsy was confidently confirmed. This case highlights the clinical presentation, diagnostic approach, and management of a rare bilateral facial palsy, emphasizing the importance of a comprehensive evaluation and considering Bell's palsy in differential diagnoses of acute facial weakness.

Chimeric Antigen Receptor T-Cell Therapy of Neurolymphomatosis Monitored by FDG PET/CT

ABSTRACT

18 F-FDG PET/CT was performed to evaluate possible recurrent B-cell lymphoblastic lymphoma in a 34-year-old man. The images showed multiple foci of increased activity in the nerve root and peripheral nerve. A biopsy confirmed the diagnosis of neurolymphomatosis. After receiving chemotherapy, PET/CT showed progressive disease. The patient subsequently received the CD-19 chimeric antigen receptor T-cell therapy. A follow-up PET/CT acquired 30 days after chimeric antigen receptor T-cell therapy revealed no abnormal FDG activity.

Neoplastic nerve lesions

Though metastasis and malignant infiltration of the peripheral nervous system is relatively rare, physicians should have a familiarity with their presentations to allow for prompt diagnosis and initiation of treatment. This article will review the clinical presentations, diagnostic evaluation, and treatment of neoplastic involvement of the cranial nerves, nerve roots, peripheral nerves, and muscle. Due to the proximity of the neural structure traversing the skull base, metastasis to this region results in distinctive syndromes, most often associated with breast, lung, and prostate cancer. Metastatic involvement of the nerve roots is uncommon, apart from leptomeningeal carcinomatosis and bony metastasis with resultant nerve root damage, and is characterized by significant pain, weakness, and numbness of an extremity. Neoplasms may metastasize or infiltrate the brachial and lumbosacral plexuses resulting in progressive and painful sensory and motor deficits. Differentiating neoplastic involvement from radiation-induced injury is of paramount importance as it dictates treatment and prognosis. Neurolymphomatosis, due to malignant lymphocytic infiltration of the cranial nerves, nerve roots, plexuses, and peripheral nerves, deserves special attention given its myriad presentations, often mimicking acquired demyelinating neuropathies.

Plexus and peripheral nerve metastasis

Cancer in the form of solid tumors, leukemia, and lymphoma can infiltrate and metastasize to the peripheral nervous system, including the cranial nerves, nerve roots, cervical, brachial and lumbosacral plexuses, and, rarely, the peripheral nerves. This review discusses the presentation, diagnostic evaluation, and treatment options for metastatic lesions to these components of the peripheral nervous system and is organized based on the anatomic distribution. As skull base metastases (also discussed in Chapter 14) result in cranial neuropathies, these will be covered in detail, as well as cancers that directly infiltrate the cranial nerves. Particular emphasis is placed on the clinical, imaging, and electrodiagnostic features that differentiate neoplastic plexopathies from radiation-induced plexopathies. Neurolymphomatosis, in which malignant lymphocytes invade the cranial nerves, nerve roots, brachial and lumbosacral plexuses, and peripheral nerves, is a rare manifestation of lymphoma and leukemia. Diagnoses of neurolymphomatosis are often missed or delayed given its varied presentations, resulting in poorer outcomes. Thus this disease will also be discussed in depth.