BOC Hematology Questions with 100% Correct
Answers| Verified Solutions Latest 2024/2025
update
The characteristic peripheral blood morphologic feature in multiple myeloma is -
✔✔Rouleaux formation
In polycythemia vera, the hemoglobin, hematocritm, red blood cell count and red cell
mass are - ✔✔Elevated
The M:E ratio in polycythemia vera is usually - ✔✔Normal
Many microspherocytes, schistocytes and budding off of spherocytes can be seen on
peripheral blood smears of patients with - ✔✔Extensive burns
Which of the following is most closely associated with erythroleukemia - ✔✔Rigned
sideroblasts, nuclear budding and Howell-Jolly bodies
The most characteristic peripheral blood smear finding in multiple myeloma is -
✔✔Rouleaux formation of the red cells
The values below were obtained on an automated blood count system performed on a
blood sample from a 25-year-old man:
PATIENT:
WBC: 5.1 x 10³/µL (5.1 x 10⁹/L)
,RBC: 2.94 x 10⁶/µL (2.94 x 10¹²/L)
Hgb: 13.8 g/dL (138 g/L)
Hct: 35.4%
MCV: 128 µm³ (128 fL)
MCH: 46.7 pg
MCHC: 40%
NORMAL:
WBC: 5.0-10.0 x 10³/µL
RBC: 4.6-6.2 x 10⁶/µL (4.6-6.2 x 10²/L)
Hgb: 14-18 g/dL (140-180 g/L)
Hct: 40-54%
MCV: 82-90 µm³ (82-90 fL)
MCH: 27-31 pg
MCHC 32-36%
These results are most consistent with which of the following - ✔✔A high titer of cold
agglutinins
A common source of interference in the cyanmethemoglobin method is - ✔✔Very
high WBC count
The most appropriate screening test for detecting hemoglobin F is - ✔✔Kleihauer-
Betke
The most appropriate screening test for hemoglobin S is - ✔✔Dithionite solubility
,Hematology standards include - ✔✔Certified cyanmethemoglobin solution
When using the turbidity (solubility) method for detecting hte presence of hemoglobin
S, an incorrect interpretation may be made when there is a(n) - ✔✔Increased
hemoglobin
The laboratory findings on a patient are as follows:
MCV: 55 µm³ (55 fL)
MCHC: 25%
MCH: 17 pg
A stained blood film of this patient would most likely reveal a red cell picture that is -
✔✔Microcytic, hypochromic
A patient has the following laboratory results:
RBC: 2.00 x 10⁶/µL (2.00 x 10¹²/L)
Hct: 24%
Hgb: 6.8 g/dL (68 g/L)
Reticulocytes: 0.8%
The mean corpuscular volume (MCV) of the patient is - ✔✔123 µm³ (120 fL)
The following results were obtained from a post-surgical patient receiving total
parenteral nutrition:
HOSPITAL DAY 17:
Hgb: 12.1 g/dL (121 g/L)
, Hct: 29.2%
HOSPITAL DAY 18:
Hgb: 11.6 g/dL (116 g/L)
Hct: 29.4%
HOSPITAL DAY 19:
Hgb: 9.4 g/dL (94 g/L)
Hct: 29.8%
The most consistent explanation for the above data is - ✔✔Lipid interference on days
17 and 18
A patient has a high cold agglutinin titer. Automated cell counter results reveal an
elevated MCV, MCH and MCHC. Individual erythrocytes appear normal on a stained
smear, but agglutinates are noted. The appropriate course of action would be to -
✔✔Repeat the determinations using a prewarmed microsample of diluted blood
A blood sample from a patient with a high-titer cold agglutinin, analyzed at room
temperature, with an electronic particle counter would cause an error in the -
✔✔MCV and MCHC
When using an electronic cell counter, which of the following results can occur in the
presence of a cold agglutinin - ✔✔Increased MCV and decreased RBC
In polycythemia vera, the leukocyte alkaline phosphatase activity is - ✔✔ElevatedLAP
activity may be increased in polycythemia vera
Which of the following is the formula for mean corpuscular hemoglobin (MCH) -
✔✔(Hgb x 10)/RBC
Answers| Verified Solutions Latest 2024/2025
update
The characteristic peripheral blood morphologic feature in multiple myeloma is -
✔✔Rouleaux formation
In polycythemia vera, the hemoglobin, hematocritm, red blood cell count and red cell
mass are - ✔✔Elevated
The M:E ratio in polycythemia vera is usually - ✔✔Normal
Many microspherocytes, schistocytes and budding off of spherocytes can be seen on
peripheral blood smears of patients with - ✔✔Extensive burns
Which of the following is most closely associated with erythroleukemia - ✔✔Rigned
sideroblasts, nuclear budding and Howell-Jolly bodies
The most characteristic peripheral blood smear finding in multiple myeloma is -
✔✔Rouleaux formation of the red cells
The values below were obtained on an automated blood count system performed on a
blood sample from a 25-year-old man:
PATIENT:
WBC: 5.1 x 10³/µL (5.1 x 10⁹/L)
,RBC: 2.94 x 10⁶/µL (2.94 x 10¹²/L)
Hgb: 13.8 g/dL (138 g/L)
Hct: 35.4%
MCV: 128 µm³ (128 fL)
MCH: 46.7 pg
MCHC: 40%
NORMAL:
WBC: 5.0-10.0 x 10³/µL
RBC: 4.6-6.2 x 10⁶/µL (4.6-6.2 x 10²/L)
Hgb: 14-18 g/dL (140-180 g/L)
Hct: 40-54%
MCV: 82-90 µm³ (82-90 fL)
MCH: 27-31 pg
MCHC 32-36%
These results are most consistent with which of the following - ✔✔A high titer of cold
agglutinins
A common source of interference in the cyanmethemoglobin method is - ✔✔Very
high WBC count
The most appropriate screening test for detecting hemoglobin F is - ✔✔Kleihauer-
Betke
The most appropriate screening test for hemoglobin S is - ✔✔Dithionite solubility
,Hematology standards include - ✔✔Certified cyanmethemoglobin solution
When using the turbidity (solubility) method for detecting hte presence of hemoglobin
S, an incorrect interpretation may be made when there is a(n) - ✔✔Increased
hemoglobin
The laboratory findings on a patient are as follows:
MCV: 55 µm³ (55 fL)
MCHC: 25%
MCH: 17 pg
A stained blood film of this patient would most likely reveal a red cell picture that is -
✔✔Microcytic, hypochromic
A patient has the following laboratory results:
RBC: 2.00 x 10⁶/µL (2.00 x 10¹²/L)
Hct: 24%
Hgb: 6.8 g/dL (68 g/L)
Reticulocytes: 0.8%
The mean corpuscular volume (MCV) of the patient is - ✔✔123 µm³ (120 fL)
The following results were obtained from a post-surgical patient receiving total
parenteral nutrition:
HOSPITAL DAY 17:
Hgb: 12.1 g/dL (121 g/L)
, Hct: 29.2%
HOSPITAL DAY 18:
Hgb: 11.6 g/dL (116 g/L)
Hct: 29.4%
HOSPITAL DAY 19:
Hgb: 9.4 g/dL (94 g/L)
Hct: 29.8%
The most consistent explanation for the above data is - ✔✔Lipid interference on days
17 and 18
A patient has a high cold agglutinin titer. Automated cell counter results reveal an
elevated MCV, MCH and MCHC. Individual erythrocytes appear normal on a stained
smear, but agglutinates are noted. The appropriate course of action would be to -
✔✔Repeat the determinations using a prewarmed microsample of diluted blood
A blood sample from a patient with a high-titer cold agglutinin, analyzed at room
temperature, with an electronic particle counter would cause an error in the -
✔✔MCV and MCHC
When using an electronic cell counter, which of the following results can occur in the
presence of a cold agglutinin - ✔✔Increased MCV and decreased RBC
In polycythemia vera, the leukocyte alkaline phosphatase activity is - ✔✔ElevatedLAP
activity may be increased in polycythemia vera
Which of the following is the formula for mean corpuscular hemoglobin (MCH) -
✔✔(Hgb x 10)/RBC
