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Case Study (2)- Chronic Myeloid Leukemia (CML)


Case Study (2)- Chronic Myeloid Leukemia (CML) 

History:

37-year-old female. History of fibrocystic breast disease. Seen for routine workup before breast biopsy. 

Physical Examination:

Moderate splenomegaly.
No other organomegaly

Laboratory Investigations:

1. CBC: (with microscopic differential)

RBC 4.27 x 1012/L

HGB 13.5 g/dL

HCT 41.2 %

MCV 96.3 fL

MCH 31.3 pg

MCHC 32.5 g/dL

WBC 133.6 x 109/L

N seg 56 %

N band 15 %

N metamyelocytes 13 %

N myelocytes 4 %

N promyelocytes 3 %

L 3 %

M 4 %

E 1 %

Blasts 1 %

PLT 416 x109/L

Morphologic Alterations

Results of the blood smear exam were:

RBC morphology: Normocytic, normochromic

WBC morphology: Mature stages and precursors all within normal morphologic limits.

PLT morphology: Within normal limits


2. Bone marrow examination:

Aspirate differential (1000 cells):

Erythroblasts 9.9%

Myeloblasts 1.1 N

promyelocytes 1.4 N and precursors 71.7L 2.0M 2.8E and precursors 2.2 B and precursors 8.9

Sections: Markedly hypercellular with increased megakaryocytes.

3. Cytochemistry:

Leukocyte alkaline phosphatase [LAP] score: 3 (RI 64-176)

4. Cytogenetics:

46, XX, t (9;22) (q34; q11) (Philadelphia chromosome) seen in all marrow cells analyzed.

 

Diagnosis: 

Chronic Myeloid Leukemia (CML)

Clinical Course

Following the standard preparatory regimen, the patient received an allogeneic bone marrow transplant. The donor was her HLA-matched brother.

Her post-transplant course went well, and 28 days later, her hemoglobin was 11.9 g/dL, WBC 2.0 x 109/L, and PLT 84 x 109/L. Her marrow showed evidence of good engraftment in all three cell lines.

This patient continues to be followed in Hematology Clinic. At last visit, ten years post-transplant, she was doing well and had no evidence of recurrent of the disease. Molecular diagnostic test performed at that time were negative for BCR-abl transcripts.



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