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Letter to the Editor
Multiple cranial neuropathy secondary to neurolymphomatosis as initial presentation of lymphoma
Multineuritis craneal por neurolinfomatosis primaria como manifestación inicial de linfoma
A.M. Diezma-Martín
Corresponding author
, M.I. Morales-Casado, M. de la Torre de la Paz, R. Almansa-Castillo
Hospital Universitario de Toledo, Toledo, Spain
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with little information available on its form of presentation&#44; course&#44; diagnosis&#44; and treatment&#44; hence the interest of the present report&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">We present the case of a 36-year-old man with no relevant medical history&#46; Over the course of 3 months&#44; he progressively developed symptoms of paralysis of the left abducens nerve&#44; left peripheral facial palsy&#44; which subsequently improved&#44; and right peripheral facial palsy&#46; At admission&#44; the neurological examination revealed cranial nerve involvement &#40;both abducens nerves and right facial nerve&#41;&#44; with no other relevant finding&#46; We observed no alterations in the initial assessment&#44; which included neuroimaging studies &#40;brain CT&#44; contrast-enhanced MRI study of the brain and base of the skull&#41;&#44; blood analysis &#40;biochemistry&#44; microbiological study&#44; tumour markers&#44; autoimmune study&#44; angiotensin-converting enzyme &#91;ACE&#93;&#44; vitamin B<span class="elsevierStyleInf">12</span>&#44; folic acid&#44; thyroid hormones&#44; total protein test&#44; electrophoresis&#44; serology tests&#44; and rapid antigen test and polymerase chain reaction test for SARS-CoV-2&#41;&#44; and testicular and thyroid ultrasound&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">The cerebrospinal fluid &#40;CSF&#41; analysis after lumbar puncture showed lymphocytic pleocytosis &#40;68<span class="elsevierStyleHsp" style=""></span>cells&#47;mm<span class="elsevierStyleSup">3</span>&#44; glucose level of 51<span class="elsevierStyleHsp" style=""></span>mg&#47;dL&#44; and total protein level of 38&#46;00<span class="elsevierStyleHsp" style=""></span>mg&#47;dL&#41; but the remaining findings &#40;cytobiochemistry&#44; ACE&#44; oligoclonal bands&#44; microbiology study&#44; Gram staining&#44; cultures&#44; and serology studies&#41; were negative&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Most CSF lymphocytes presented atypical morphological characteristics under the light microscope&#44; and a flow cytometry study showed an abnormal lymphocyte population expressing an immunophenotype compatible with leukaemia&#47;T-lymphoblastic lymphoma&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Considering these findings&#44; we requested a chest&#44; abdomen&#44; and pelvis CT scan&#44; which revealed an infiltrative renal mass &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; A thick-needle biopsy and anatomical pathology study of a sample from the right renal mass confirmed infiltration of the renal parenchyma by an atypical lymphoid population with a high proliferative index&#44; compatible with T-lymphoblastic lymphoma&#46; Bone marrow biopsy showed mild infiltration &#40;1&#46;6&#37;&#41;&#46; The patient started treatment with dexamethasone at 6<span class="elsevierStyleHsp" style=""></span>mg every 6 hours&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0035" class="elsevierStylePara elsevierViewall">After the definitive diagnosis of T-lymphoblastic lymphoma&#44; he started triple intrathecal therapy &#40;TIT&#59; methotrexate&#44; cytarabine&#44; and hydrocortisone&#41; and intensive systemic chemotherapy following the 2011 protocol for acute lymphoblastic lymphoma&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">The patient responded well to treatment&#44; with progressive improvement and eventually resolution of neurological symptoms&#46; After one TIT cycle&#44; CSF was acellular and flow cytometry revealed no disease&#46; A follow-up CT scan showed almost complete resolution of the renal masses&#46; The patient was transferred to the haematology department with no neurological symptoms&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">Multiple cranial neuropathy requires good clinical integration and comprehensive assessment&#44; with a broad differential diagnosis including multiple aetiologies &#40;neoplastic&#44; infectious&#44; vascular&#44; autoimmune&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> These symptoms may develop as a result of involvement at any anatomical location&#44; from the brainstem to the peripheral nerves&#46; Once the aetiology of the symptoms has been identified&#44; the therapeutic approach to multiple cranial neuropathy consists of specifically treating the underlying condition&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">One of the least frequent aetiologies causing these symptoms is neurolymphomatosis&#46; Neurolymphomatosis may precede the systemic disease in up to 25&#37; of cases&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> As this manifestation is rare in malignant haematological disorders&#44; its diagnosis is sometimes delayed and its incidence remains unknown&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> The clinical heterogeneity and non-specific brain imaging findings&#44; together with the low yield of CSF analysis &#40;lymphoma cells are detected in only 20&#37;&#8211;40&#37; of cases&#41; may lead to underdiagnosis and delayed treatment of the underlying haematological disorder&#46; Early treatment of the underlying condition leads to better prognosis&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a></p><p id="par0055" class="elsevierStylePara elsevierViewall">To date&#44; there is no consensus on the optimal treatment&#59; the literature mentions intensive chemotherapy with regimes intended to treat primary CNS lymphoma or relapsed lymphoma&#46;<a class="elsevierStyleCrossRefs" href="#bib0025"><span class="elsevierStyleSup">5&#44;6</span></a> In the case of neurolymphomatosis in T-lymphoblastic lymphoma&#44;<a class="elsevierStyleCrossRefs" href="#bib0040"><span class="elsevierStyleSup">8&#44;11</span></a> therapeutic strategies are the same as those used in acute lymphoblastic leukaemia&#46;<a class="elsevierStyleCrossRefs" href="#bib0060"><span class="elsevierStyleSup">12&#44;13</span></a> Treatment should be based on consensus between experienced haematologists&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Regarding prognosis&#44; the majority of patients respond well to initial chemotherapy&#44; achieving good functional outcomes&#46; However&#44; long-term prognosis is poor&#44; with a mean survival time of 10 months&#44; which may be somewhat longer in the case of primary lymphomatosis&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Funding</span><p id="par0065" class="elsevierStylePara elsevierViewall">This study received no funding of any kind&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Conflicts of interest</span><p id="par0070" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare&#46;</p></span></span>"
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