Hydrosalpinx Imaging Diagnosis

Step-by-step decision

Choose step by step as prompted; reaching an endpoint gives the management recommendation. You can go back a step or restart anytime.

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Full pathway

1. [Decision] Identifying the adnexal cystic structure
   Adnexal cystic structure — tubular shape vs ovarian origin? (Hydrosalpinx = distal obstruction causing tubal fluid (pus = pyosalpinx, blood = hematosalpinx); usually secondary to PID, ligation, endometriosis, postoperative adhesions. US signs: a tubular/S-C-shaped cyst separate from the ovary; cogwheel sign (thickened folds on cross-section = spokes, subacute), beads-on-a-string sign (mural nodules 2–3 mm, chronic), waist sign (opposing-wall indentations, + tubular = specific), incomplete septa; no flow.)
   • Tubular/waist sign/cogwheel/beads + a separate normal ipsilateral ovary seen → Typical hydrosalpinx · benign
   • Rounded/with solid component/inseparable from the ovary/suspicious mass → Atypical · characterize by O-RADS
   • Thick wall, internal debris + hyperemia with pain and fever (suspected pyosalpinx/TOA) → Suspected pyosalpinx/TOA · antibiotics ± drainage
2. [End] Typical hydrosalpinx · benign
   Typical hydrosalpinx (tubular + waist sign/cogwheel/beads, with a separate normal ipsilateral ovary): benign; the key is identifying a separate normal ovary to differentiate from a cystadenoma (extra-ovarian cystic masses are rarely malignant); asymptomatic conservative, symptomatic/infertility → salpingectomy (improves IVF outcomes).
3. [End] Atypical · characterize by O-RADS
   Atypical (rounded/with solid component/inseparable from the ovary/scarred and multiloculated): scarred hydrosalpinx can mimic a multiloculated mass; characterize further by O-RADS, MRI if needed, to exclude an ovarian tumor.
4. [End] Suspected pyosalpinx/TOA · antibiotics ± drainage
   Thick wall + internal debris + hyperemia with pain/fever (suspected pyosalpinx/tubo-ovarian abscess): manage as PID/TOA — broad-spectrum antibiotics ± drainage; unlike simple hydrosalpinx, needs prompt treatment, alert for torsion.

Source guidelines & references

• Hydrosalpinx ultrasound signs and differentiation (AJR 2006; Radiopaedia) · source ↗

This pathway is our own synthesis of the decision logic in the guidelines above (not the guideline verbatim); thresholds and workflows change as guidelines update — in practice follow the latest guideline, your institution's protocol and the individual patient.

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