In the following USG scan snowstorm appearance is seen which is possibly seen in?

NORCET-7 Mains-2024

Obstetrics & Gynaecology

Easy

Appeared in: NORCET-7 Mains-2024

Explanation

The ultrasound image displays a classic "snowstorm" pattern within the uterus, which is a pathognomonic (a characteristic sign) for a Hydatidiform Mole.
A hydatidiform mole is a form of gestational trophoblastic disease where there is abnormal proliferation of the chorionic villi of the placenta.
The "snowstorm" appearance is created by these numerous swollen, fluid-filled (hydropic) villi, which appear as multiple small cysts on the ultrasound.
The absence of a fetus in the image is characteristic of a complete mole, which results from the fertilization of an empty egg.

Option A: An ectopic pregnancy involves implantation outside the uterine cavity. An ultrasound would typically show an empty uterus and a gestational sac or complex mass in an adnexal location (e.g., fallopian tube).
Option C: Endometriosis involves endometrial tissue growing outside the uterus. On ultrasound, it may appear as ovarian cysts (endometriomas) with a uniform 'ground-glass' echo pattern, not a multicystic mass inside the uterus.
Option D: Disseminated Intravascular Coagulation (DIC) is a systemic disorder of blood clotting and is not a structural abnormality diagnosed by ultrasound. It can be a severe complication of a molar pregnancy but is not the primary diagnosis based on this image.

Visual 1: Diagram: Pathogenesis of a complete mole vs. a partial mole, showing the chromosomal origin (androgenesis in a complete mole).
Visual 2: Chart: Typical pattern of serum beta-hCG level decline after successful evacuation of a molar pregnancy versus the pattern seen in persistent gestational trophoblastic neoplasia (GTN).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Ultrasound diagnosis of Hydatidiform Mole as background academic context rather than a clinical decision trigger.
Nurses must monitor patients with molar pregnancy for signs of serious complications, including hemorrhage, hyperthyroidism (due to the thyrotropin-like effects of hCG), and severe preeclampsia, which can occur early in gestation.
Patient education is a critical nursing role, focusing on the necessity of long-term follow-up with serial beta-hCG monitoring to screen for malignant transformation into choriocarcinoma.
It is vital to counsel the patient on the importance of using reliable contraception during the entire follow-up period, as a new pregnancy would produce hCG and interfere with monitoring for malignancy.

How to Approach the Question

First, identify the type of image provided, which is a pelvic ultrasound (USG).
Systematically analyze the image for key features. Observe the contents of the uterus, noting the heterogeneous texture and the presence of multiple small, black (anechoic) circles.
Recognize this distinctive pattern as the classic "snowstorm" appearance.
Recall or deduce which obstetrical condition is associated with this pathognomonic sign.
Evaluate the given options. Hydatidiform mole is the direct match for the "snowstorm" sign.
Rule out the other options by considering their typical, and different, sonographic presentations.

Concept Tested & Keywords

Concept Tested: Ultrasound diagnosis of Hydatidiform Mole
Stem keywords: USG scan, snowstorm appearance
Lead-in keywords: possibly seen in
Clinical cues: Image shows 'snowstorm' appearance on ultrasound, a pathognomonic sign.

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