LATEST ARDMS REGISTERED
DIAGNOSTIC MEDICAL SONOGRAPHER
(RDMS) – OBSTETRICS & GYNECOLOGY
(OB/GYN) EXAM | QUESTIONS WITH
ANSWERS AND RATIONALES
1. What is the normal appearance of the uterus on
ultrasound (premenopausal)?
A) Pear-shaped, homogeneous myometrium (medium
echogenicity), thin central echogenic endometrial
stripe
B) Globular, heterogeneous myometrium (fibroids)
C) Anechoic fluid collection
D) Hypoechoic mass
Correct answer: A
Rationale: Normal uterus: homogeneous
myometrium, thin linear or curvilinear echogenic
endometrium (varies with cycle).
2. What is the normal endometrial stripe thickness in
a postmenopausal woman (not on hormone therapy)?
A) ≤5 mm (≥5 mm requires evaluation)
,B) ≤10 mm
C) ≤2 mm
D) ≤15 mm
Correct answer: A
Rationale: Postmenopausal endometrium ≤5 mm is
normal; >5 mm requires investigation (endometrial
biopsy or sonohysterography).
3. Which of the following is the sonographic finding of
a uterine fibroid (leiomyoma)?
A) Hypoechoic or heterogeneous solid mass, well-
circumscribed, with posterior shadowing (often
shadowing), may be calcified, and shows peripheral
or intralesional vascularity
B) Anechoic cyst
C) Complex cystic mass
D) Echogenic mass without shadowing
Correct answer: A
Rationale: Fibroids: solid, hypoechoic or
heterogeneous; may calcify; exhibit edge shadowing;
"whorled" appearance.
,4. Which of the following is the sonographic finding of
adenomyosis?
A) Diffuse or focal thickening of the myometrium,
heterogeneous myometrium, small anechoic cysts
(lakes) within myometrium, linear echogenic
striations, poor definition of the endometrial–
myometrial junction
B) Well-circumscribed hypoechoic mass (fibroid)
C) Endometrial thickening
D) Ovarian cyst
Correct answer: A
Rationale: Adenomyosis: ectopic endometrial tissue
within myometrium, causing heterogeneous
myometrium, myometrial cysts, and vascular
changes.
5. Which of the following is the sonographic finding of
an endometrial polyp?
A) Focal echogenic mass within endometrial canal
(hyperechoic), may have vascular stalk on Doppler,
smooth contour
B) Hypoechoic mass
C) Anechoic cyst
D) Diffuse endometrial thickening
, Correct answer: A
Rationale: Endometrial polyp: well-defined,
hyperechoic or isoechoic mass within the
endometrial cavity, often with a feeding vessel.
6. Which of the following is the sonographic finding of
an endometrial carcinoma (endometrial cancer)?
A) Diffuse or focal heterogeneous endometrial
thickening, irregular margins, increased vascularity
(Doppler), possible myometrial invasion
B) Simple cyst
C) Thin uniform endometrium
D) Fibroid
Correct answer: A
Rationale: Endometrial cancer: thickened,
heterogeneous endometrium with increased
vascularity; assess for myometrial invasion.
7. Which of the following is the correct patient
preparation for a transabdominal pelvic ultrasound?
A) Full bladder (distended to act as acoustic window
to visualize uterus, ovaries)
B) Empty bladder
DIAGNOSTIC MEDICAL SONOGRAPHER
(RDMS) – OBSTETRICS & GYNECOLOGY
(OB/GYN) EXAM | QUESTIONS WITH
ANSWERS AND RATIONALES
1. What is the normal appearance of the uterus on
ultrasound (premenopausal)?
A) Pear-shaped, homogeneous myometrium (medium
echogenicity), thin central echogenic endometrial
stripe
B) Globular, heterogeneous myometrium (fibroids)
C) Anechoic fluid collection
D) Hypoechoic mass
Correct answer: A
Rationale: Normal uterus: homogeneous
myometrium, thin linear or curvilinear echogenic
endometrium (varies with cycle).
2. What is the normal endometrial stripe thickness in
a postmenopausal woman (not on hormone therapy)?
A) ≤5 mm (≥5 mm requires evaluation)
,B) ≤10 mm
C) ≤2 mm
D) ≤15 mm
Correct answer: A
Rationale: Postmenopausal endometrium ≤5 mm is
normal; >5 mm requires investigation (endometrial
biopsy or sonohysterography).
3. Which of the following is the sonographic finding of
a uterine fibroid (leiomyoma)?
A) Hypoechoic or heterogeneous solid mass, well-
circumscribed, with posterior shadowing (often
shadowing), may be calcified, and shows peripheral
or intralesional vascularity
B) Anechoic cyst
C) Complex cystic mass
D) Echogenic mass without shadowing
Correct answer: A
Rationale: Fibroids: solid, hypoechoic or
heterogeneous; may calcify; exhibit edge shadowing;
"whorled" appearance.
,4. Which of the following is the sonographic finding of
adenomyosis?
A) Diffuse or focal thickening of the myometrium,
heterogeneous myometrium, small anechoic cysts
(lakes) within myometrium, linear echogenic
striations, poor definition of the endometrial–
myometrial junction
B) Well-circumscribed hypoechoic mass (fibroid)
C) Endometrial thickening
D) Ovarian cyst
Correct answer: A
Rationale: Adenomyosis: ectopic endometrial tissue
within myometrium, causing heterogeneous
myometrium, myometrial cysts, and vascular
changes.
5. Which of the following is the sonographic finding of
an endometrial polyp?
A) Focal echogenic mass within endometrial canal
(hyperechoic), may have vascular stalk on Doppler,
smooth contour
B) Hypoechoic mass
C) Anechoic cyst
D) Diffuse endometrial thickening
, Correct answer: A
Rationale: Endometrial polyp: well-defined,
hyperechoic or isoechoic mass within the
endometrial cavity, often with a feeding vessel.
6. Which of the following is the sonographic finding of
an endometrial carcinoma (endometrial cancer)?
A) Diffuse or focal heterogeneous endometrial
thickening, irregular margins, increased vascularity
(Doppler), possible myometrial invasion
B) Simple cyst
C) Thin uniform endometrium
D) Fibroid
Correct answer: A
Rationale: Endometrial cancer: thickened,
heterogeneous endometrium with increased
vascularity; assess for myometrial invasion.
7. Which of the following is the correct patient
preparation for a transabdominal pelvic ultrasound?
A) Full bladder (distended to act as acoustic window
to visualize uterus, ovaries)
B) Empty bladder
