The film for this patient showed moderate sized lymphocytes with frequently clefted nuclei and nucleoli. There were no smear cells. The laboratory staff decided to send the specimen for flow cytometry and obtained the following results:

• CD5+
• CD10-
• CD19+
• CD20+
• CD23-
• FMC7+

T cell and myeloid markers were negative.

What do you think the diagnosis is now?

What test will help you clinch the diagnosis?

What other tests may you need to do?

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