A Case of Multiple Myeloma Presenting with Neck Pain and Tetraparesis

86-year-old female patient applied to our clinic with complaints of weakness and neck pain in arms and legs that had been going on for a week. Her pain did not decrease with rest and did not respond to medical therapy. The pain in her neck did not affect her arms and she did not have comorbid neuropathic pain. In addition, muscle weakness had started. In the physical examination of the patient whose gait pattern was ataxic and who did not have a history of known trauma or operation, the neck region paravertebral area was found to be hard and sensitive with palpation. The patient who had diffuse 4/5 muscle strength had dermatomal hypoesthesia C4-C5 at both sides. The patient’s deep tendon reflexes were hyperactive and her laboratory examination results were as follows: Hemoglobin 9.2 g/dL, C-reactive protein: 60 mg/dL and erythrocyte sedimentation rate: 100 mm/h. Platelet and white blood cell count and routine biochemical tests were normal. Cervical magnetic resonance imaging was requested for advanced examination of the patient whose direct graphy showed lytic lesion at C5. The mass in epidural region at C5 caused a pressure on the spinal cord and the posterior of C5 vertebra was compatible with posterior lytic appearance (Figure 1-2). In the post-operative examination of the patient who underwent laminectomy and decompression surgery at C4-C5, neurological deficit was found to recover. As a result of pathological examination and immunohistochemical tests, the patient was diagnosed with multiple myeloma (Kappa subtype). Monoclonal immunoglobulin (Ig) G was found to increase in blood and urine protein electrophoresis analysis, while other immunoglobulins were found to decrease. Levels of serum Ig were IgA: 0.67, IgM:0.4 g/L and IgG:50 g/L, respectively. There was Bence Jones protein in the urine. Bone marrow aspiration consisted of 45% plasma cells. The patient who received triple chemotherapy combination and zoledronic acid therapy responded positively to the therapy. The patient is being followed by our clinic and she is continuing her followups with a good general medical condition, decreased pain and normal physical examination. In neck, back and low-back pain resistant to treatment, primary tumours of the spine and tumour cases which affect the spine as a result of metastasis should be kept in mind (1,2). Multiple myeloma results from plasma cells which infiltrate the bone marrow and synthesize abnormal immunoglobulin (3). Laboratory examinations of multiple myeloma, which is the malignant tumour that involves the bone most, depend on bone marrow involvement. Pain is the most primary symptom. The disease, which is quite rare before the age of 40 is generally more frequent between 50 and 70 years of age and in men (3). The source of pain is lytic bone lesions DOI: 10.4274/tod.galenos.2020.92005 Turk J Osteoporos 2020;26:45-6