Open AccessDiplopia as the initial symptom of multiple myeloma in a patient with sarcoidosis
Author(s) -
Omid Yazdanpanah,
Jasleen Kaur,
Irfan Shafi,
Housam Sarakbi
Publication year - 2020
Publication title -
bmj case reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.231
H-Index - 26
ISSN - 1757-790X
DOI - 10.1136/bcr-2020-235725
Subject(s) - medicine , clivus , diplopia , multiple myeloma , immunofixation , plasmacytoma , bone marrow , biopsy , sarcoidosis , serum protein electrophoresis , radiology , open biopsy , sinus (botany) , pathology , skull , surgery , monoclonal , botany , antibody , biology , immunology , monoclonal antibody , genus
We present the case of a 45-year-old man with a known history of sarcoidosis who presented with double vision and headache. On examination, he was found to have left abducens and hypoglossal nerve palsy. CT and then MRI demonstrated extensive osseous lesions with a large expansile mass involving the clivus bone and sphenoid sinus. Laboratory data were remarkable for normocytic anaemia, low anion gap and elevated total protein which raised the suspicion for multiple myeloma. Subsequent protein electrophoresis and immunofixation illustrated monoclonal spike of IgG lambda present in the gamma zone. This was followed by a bone marrow biopsy that demonstrated plasma cells compromising around 80% of marrow cellularity. Left sphenoidal mass biopsy was consistent with plasmacytoma. Based on these findings, the patient was initially started on palliative radiation to shrink the intracranial tumour and is currently undergoing induction chemotherapy.