Updated: 8/11/2019

Vitamin B2 (Riboflavin)

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Topic
Review Topic
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N/A
N/A
Questions
2
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0
100%
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Evidence
3
0
0
Topic
 Deficiency
  • Causes
    • severe malnourishment
  • Presentation  
    • cheilosis (inflammation of lips, scaling and fissures at the corners of the mouth)
    • corneal vascularization
    • magenta colored tongue
Excess
  • Water soluble so excess vitamin is excreted in the urine

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Average 5.0 of 1 Ratings

Questions (2)

(M2.NT.17.4754) A 69-year-old patient is brought into his primary care physician by his daughter. The daughter states that ever since the patient's wife died a year ago he has not been caring for himself. The patient does not answer any questions, and is unkempt, wearing only a bathrobe. The daughter continues that the patient no longer hunts which was his previous favorite activity. In addition, he will not leave the house or cook unless with his daughter. The patient has a past medical history of diabetes, obesity, hypertension, congestive heart failure, and anxiety. His current medications include metformin, insulin, captopril, metoprolol, and hydrochlorothiazide, though the daughter is unsure if the patient has been taking his medications. On physical exam you note the finding in Figure A. You also note the finding in figure B which the daughter states is a new occurrence. The patient has mild bilateral crackles and bilateral pitting edema. You also note that the patient has a tremor that occurs when he is writing or handing something to his daughter. Which of the following is the most likely explanation of this patient's physical exam findings?

QID: 109006
FIGURES:
1

Vitamin B1 deficiency

16%

(5/32)

2

Vitamin B2 deficiency

56%

(18/32)

3

Vitamin B3 deficiency

19%

(6/32)

4

Pityrosporum ovale

0%

(0/32)

5

Parkinson disease

6%

(2/32)

M 7 E

Select Answer to see Preferred Response

(M2.NT.14.190) A 29-year-old man who recently immigrated from Russia presents to the free clinic with multiple complaints. He has a sore throat, fatigue, a rash, and sensitivity to light. He states he has never seen a doctor in his country and his past medical history is not known. His temperature is 97.9°F (36.6°C), blood pressure is 118/74 mmHg, pulse is 82/min, respirations are 17/min, and oxygen saturation is 98% on room air. Physical examination reveals the finding in Figure A, glossitis, stomatitis, and a dry rash diffusely. Which of the following vitamins is most likely deficient in this patient?

QID: 105588
FIGURES:
1

A

10%

(10/100)

2

B2

55%

(55/100)

3

B6

22%

(22/100)

4

B7

4%

(4/100)

5

C

7%

(7/100)

M 6 E

Select Answer to see Preferred Response

Evidence (3)
EXPERT COMMENTS (1)
Private Note