How Is Multiple Myeloma Diagnosed? Tests, Criteria & Process
Multiple Myeloma diagnosis relies on Tissue biopsy (histopathology + immunohistochemistry), CT/PET-CT staging scan, Tumour markers (PSA, CA-125, CEA, AFP, CA 19-9). Learn the full diagnostic pathway, clinical criteria, differential workup, and what to expect at your evaluation.
Updated March 27, 2026
Multiple Myeloma is diagnosed using Tissue biopsy (histopathology + immunohistochemistry), CT/PET-CT staging scan, Tumour markers (PSA, CA-125, CEA, AFP, CA 19-9) and targeted clinical evaluation. Multiple myeloma is a cancer of plasma cells in the bone marrow, causing bone pain, anemia, kidney damage, and recurrent infections. Symptoms arise from the accumulation of abnormal plasma cells.
Clinical Context
The diagnostic process for Multiple Myeloma begins with Cross-sectional imaging for mass lesion detection; biopsy for histological confirmation; staging workup before MDT treatment decision. Key investigations include Tissue biopsy (histopathology + immunohistochemistry), CT/PET-CT staging scan, Tumour markers (PSA, CA-125, CEA, AFP, CA 19-9), Full blood count and peripheral blood film. The gold standard is: Tissue biopsy is the gold standard for all malignancies; bone marrow trephine for haematological staging. Clinical guidelines from ESMO / ASCO / NCCN / ASH / NICE Oncology define the diagnostic criteria and recommended investigation pathway.
Clinical Pathway
Multiple Myeloma — Full Condition GuideCondition HubMultiple Myeloma — Differential DiagnosisDifferentialMultiple Myeloma — Treatment PathwaysTreatmentMultiple Myeloma — Prognosis & OutlookPrognosisFrequently Asked Questions
How Is Multiple Myeloma Diagnosed? Tests, Criteria & Process?+
Multiple Myeloma is diagnosed using Tissue biopsy (histopathology + immunohistochemistry), CT/PET-CT staging scan, Tumour markers (PSA, CA-125, CEA, AFP, CA 19-9) and targeted clinical evaluation. Multiple myeloma is a cancer of plasma cells in the bone marrow, causing bone pain, anemia, kidney damage, and recurrent infections. Symptoms arise from the accumulation of abnormal plasma cells.
How do doctors test for multiple myeloma?+
The main tests used to diagnose Multiple Myeloma include Tissue biopsy (histopathology + immunohistochemistry), CT/PET-CT staging scan, Tumour markers (PSA, CA-125, CEA, AFP, CA 19-9). Your doctor will select investigations based on your symptoms, clinical findings, and risk factors.
How long does it take to diagnose Multiple Myeloma?+
The time to diagnosis varies. Some cases are identified within hours using clinical presentation and blood tests; others require weeks, repeated investigations, or specialist referral.
Can Multiple Myeloma be missed on initial testing?+
Yes — Multiple Myeloma can be missed if initial tests are negative or if the presentation is atypical. If clinical suspicion remains high, repeat testing or specialist referral is appropriate.
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