COMSAE PHASE 1 FORM 113 EXAM 2026–2027
| COMPLETE STUDY GUIDE | VERIFIED
PRACTICE QUESTIONS & DETAILED
SOLUTIONS | LATEST UPDATED EXAM PREP
COMSAE PHASE 1 FORM 113 EXAM 2026–2027 | COMPLETE STUDY GUIDE
Document Features & Study Guidance:
• This comprehensive study guide contains verified practice questions spanning all
major topics tested on the COMSAE Phase 1 Form 113 examination, providing
thorough preparation across basic and clinical sciences with detailed explanations
for each answer.
• Study this material by working through questions systematically, reviewing
EXPERT RATIONALE carefully for both correct and incorrect options to identify
knowledge gaps, and repeating high-difficulty sections to reinforce mastery before
exam day.
1. A 45-year-old male patient presents with fatigue, dyspnea on exertion, and
pallor. Laboratory findings reveal hemoglobin of 7.2 g/dL, MCV of 65 fL, and
serum ferritin of 12 ng/mL. Which of the following is the most likely
diagnosis?
A) Anemia of chronic disease
B) Vitamin B12 deficiency anemia
C) Iron deficiency anemia
D) Thalassemia major
E) Sickle cell disease
CORRECT ANSWER: C) Iron deficiency anemia
Iron deficiency anemia is characterized by a low hemoglobin, microcytic indices
(MCV <80 fL), and decreased iron stores (low ferritin). The combination of
microcytosis (MCV 65 fL) and severely depleted iron stores (ferritin 12 ng/mL) is
,diagnostic of iron deficiency. Anemia of chronic disease presents with normal or
elevated ferritin. B12 deficiency causes macrocytic anemia. Thalassemia and sickle
cell disease are inherited disorders with different laboratory patterns.
2. A 32-year-old woman with a history of recurrent urinary tract infections
presents with flank pain, fever, and costovertebral angle tenderness.
Urinalysis shows pyuria and positive nitrites. Which bacterium is most
commonly responsible for acute pyelonephritis in this patient?
A) Staphylococcus saprophyticus
B) Escherichia coli
C) Pseudomonas aeruginosa
D) Klebsiella pneumoniae
E) Proteus mirabilis
CORRECT ANSWER: B) Escherichia coli
Escherichia coli is the most common causative organism of acute pyelonephritis,
accounting for approximately 85-90% of community-acquired cases. E. coli
possesses fimbriae that allow adherence to uroepithelial cells, facilitating ascending
infection. While S. saprophyticus is common in young women with uncomplicated
cystitis, it rarely causes pyelonephritis. Pseudomonas and Proteus are more
common in complicated UTIs or catheterized patients. Klebsiella is less frequent
than E. coli in pyelonephritis.
3. A 28-year-old patient is found to have a serum sodium level of 118 mEq/L.
He is confused and exhibits seizure activity. Which of the following
medications is most appropriate for acute symptomatic hyponatremia in this
patient?
,A) Free water restriction
B) Dextrose 5% in water (D5W)
C) 3% hypertonic saline
D) Loop diuretics
E) Demeclocycline
CORRECT ANSWER: C) 3% hypertonic saline
In acute symptomatic hyponatremia with neurological manifestations (confusion,
seizures), 3% hypertonic saline is the treatment of choice. Hypertonic saline raises
serum osmolality and reduces cerebral edema caused by water intoxication. The
sodium should be corrected slowly (8-10 mEq/L in first 24 hours) to avoid osmotic
demyelination syndrome. Free water restriction is appropriate for chronic
asymptomatic hyponatremia. D5W is contraindicated. Loop diuretics and
demeclocycline are used for specific etiologies but not in acute symptomatic cases.
4. A 52-year-old man with a 40-year smoking history presents with persistent
cough, hemoptysis, and weight loss over 3 months. Chest X-ray shows a 3 cm
cavitary lesion in the right upper lobe. Which is the most likely diagnosis?
A) Pneumonia
B) Aspergilloma
C) Tuberculosis
D) Bronchiectasis
E) Lung abscess
CORRECT ANSWER: C) Tuberculosis
The clinical presentation of cavitary lung disease in the upper lobes (apical-
posterior segments), combined with constitutional symptoms (weight loss),
hemoptysis, and a significant smoking history (risk factor for TB), strongly suggests
, tuberculosis. TB characteristically produces cavitary lesions in the upper lobes due
to higher oxygen tension. Aspergilloma typically occurs in pre-existing cavities.
Pneumonia and lung abscess are acute presentations. Bronchiectasis presents with
chronic productive cough but not cavitary lesions.
5. A 19-year-old female college student develops a sudden-onset severe
headache, fever (39.8°C), and neck stiffness. On examination, she
demonstrates a positive Kernig sign and Brudzinski sign. CSF analysis shows
elevated protein (250 mg/dL), low glucose (18 mg/dL), and elevated white
blood cell count (1,200/μL with 85% PMNs). Which organism is most likely
responsible?
A) Neisseria gonorrhoeae
B) Neisseria meningitidis
C) Streptococcus pneumoniae
D) Listeria monocytogenes
E) Haemophilus influenzae
CORRECT ANSWER: B) Neisseria meningitidis
Neisseria meningitidis is the most common cause of bacterial meningitis in college-
age students and young adults. The acute presentation with classic meningeal
signs, CSF profile with elevated protein, low glucose, and PMN predominance is
typical of meningococcal meningitis. The peak incidence occurs in young adults and
adolescents. S. pneumoniae is more common in elderly and very young children. H.
influenzae is rare since Hib vaccination. Listeria and gonorrhoeae are less common
in this age group.
| COMPLETE STUDY GUIDE | VERIFIED
PRACTICE QUESTIONS & DETAILED
SOLUTIONS | LATEST UPDATED EXAM PREP
COMSAE PHASE 1 FORM 113 EXAM 2026–2027 | COMPLETE STUDY GUIDE
Document Features & Study Guidance:
• This comprehensive study guide contains verified practice questions spanning all
major topics tested on the COMSAE Phase 1 Form 113 examination, providing
thorough preparation across basic and clinical sciences with detailed explanations
for each answer.
• Study this material by working through questions systematically, reviewing
EXPERT RATIONALE carefully for both correct and incorrect options to identify
knowledge gaps, and repeating high-difficulty sections to reinforce mastery before
exam day.
1. A 45-year-old male patient presents with fatigue, dyspnea on exertion, and
pallor. Laboratory findings reveal hemoglobin of 7.2 g/dL, MCV of 65 fL, and
serum ferritin of 12 ng/mL. Which of the following is the most likely
diagnosis?
A) Anemia of chronic disease
B) Vitamin B12 deficiency anemia
C) Iron deficiency anemia
D) Thalassemia major
E) Sickle cell disease
CORRECT ANSWER: C) Iron deficiency anemia
Iron deficiency anemia is characterized by a low hemoglobin, microcytic indices
(MCV <80 fL), and decreased iron stores (low ferritin). The combination of
microcytosis (MCV 65 fL) and severely depleted iron stores (ferritin 12 ng/mL) is
,diagnostic of iron deficiency. Anemia of chronic disease presents with normal or
elevated ferritin. B12 deficiency causes macrocytic anemia. Thalassemia and sickle
cell disease are inherited disorders with different laboratory patterns.
2. A 32-year-old woman with a history of recurrent urinary tract infections
presents with flank pain, fever, and costovertebral angle tenderness.
Urinalysis shows pyuria and positive nitrites. Which bacterium is most
commonly responsible for acute pyelonephritis in this patient?
A) Staphylococcus saprophyticus
B) Escherichia coli
C) Pseudomonas aeruginosa
D) Klebsiella pneumoniae
E) Proteus mirabilis
CORRECT ANSWER: B) Escherichia coli
Escherichia coli is the most common causative organism of acute pyelonephritis,
accounting for approximately 85-90% of community-acquired cases. E. coli
possesses fimbriae that allow adherence to uroepithelial cells, facilitating ascending
infection. While S. saprophyticus is common in young women with uncomplicated
cystitis, it rarely causes pyelonephritis. Pseudomonas and Proteus are more
common in complicated UTIs or catheterized patients. Klebsiella is less frequent
than E. coli in pyelonephritis.
3. A 28-year-old patient is found to have a serum sodium level of 118 mEq/L.
He is confused and exhibits seizure activity. Which of the following
medications is most appropriate for acute symptomatic hyponatremia in this
patient?
,A) Free water restriction
B) Dextrose 5% in water (D5W)
C) 3% hypertonic saline
D) Loop diuretics
E) Demeclocycline
CORRECT ANSWER: C) 3% hypertonic saline
In acute symptomatic hyponatremia with neurological manifestations (confusion,
seizures), 3% hypertonic saline is the treatment of choice. Hypertonic saline raises
serum osmolality and reduces cerebral edema caused by water intoxication. The
sodium should be corrected slowly (8-10 mEq/L in first 24 hours) to avoid osmotic
demyelination syndrome. Free water restriction is appropriate for chronic
asymptomatic hyponatremia. D5W is contraindicated. Loop diuretics and
demeclocycline are used for specific etiologies but not in acute symptomatic cases.
4. A 52-year-old man with a 40-year smoking history presents with persistent
cough, hemoptysis, and weight loss over 3 months. Chest X-ray shows a 3 cm
cavitary lesion in the right upper lobe. Which is the most likely diagnosis?
A) Pneumonia
B) Aspergilloma
C) Tuberculosis
D) Bronchiectasis
E) Lung abscess
CORRECT ANSWER: C) Tuberculosis
The clinical presentation of cavitary lung disease in the upper lobes (apical-
posterior segments), combined with constitutional symptoms (weight loss),
hemoptysis, and a significant smoking history (risk factor for TB), strongly suggests
, tuberculosis. TB characteristically produces cavitary lesions in the upper lobes due
to higher oxygen tension. Aspergilloma typically occurs in pre-existing cavities.
Pneumonia and lung abscess are acute presentations. Bronchiectasis presents with
chronic productive cough but not cavitary lesions.
5. A 19-year-old female college student develops a sudden-onset severe
headache, fever (39.8°C), and neck stiffness. On examination, she
demonstrates a positive Kernig sign and Brudzinski sign. CSF analysis shows
elevated protein (250 mg/dL), low glucose (18 mg/dL), and elevated white
blood cell count (1,200/μL with 85% PMNs). Which organism is most likely
responsible?
A) Neisseria gonorrhoeae
B) Neisseria meningitidis
C) Streptococcus pneumoniae
D) Listeria monocytogenes
E) Haemophilus influenzae
CORRECT ANSWER: B) Neisseria meningitidis
Neisseria meningitidis is the most common cause of bacterial meningitis in college-
age students and young adults. The acute presentation with classic meningeal
signs, CSF profile with elevated protein, low glucose, and PMN predominance is
typical of meningococcal meningitis. The peak incidence occurs in young adults and
adolescents. S. pneumoniae is more common in elderly and very young children. H.
influenzae is rare since Hib vaccination. Listeria and gonorrhoeae are less common
in this age group.
