Perioperative Prophylaxis for Venous Thromboembolism in Cushing's Syndrome

STEP 1 — Gather Information

Confirm diagnosis of Cushing's syndrome (elevated UFC, late-night salivary cortisol, or dexamethasone suppression test); note type and urgency of surgery; assess baseline VTE risk factors (prior VTE, malignancy, obesity, immobilization, estrogen use, thrombophilia); review bleeding risk (active bleeding, coagulopathy, recent surgery, platelet count, anticoagulant use); obtain baseline coagulation labs if indicated.

STEP 2 — Rule In / Rule Out

Is the patient with Cushing's syndrome scheduled for a surgical procedure? If yes, proceed to assess thrombotic and bleeding risk; if no, routine VTE prophylaxis is not indicated solely for Cushing's syndrome (consider standard indications).

STEP 3 — Classify or Stratify

Stratify thrombotic risk: high if major surgery (e.g., bilateral adrenalectomy, transsphenoidal resection) plus any additional VTE risk factor (prior VTE, malignancy, obesity >30 kg/m2, prolonged immobilization); moderate if major surgery without additional risk factors or minor surgery with risk factors; low if minor surgery without risk factors. Assess bleeding risk: high if active bleeding, coagulopathy, platelet <50k, recent intracranial hemorrhage, or planned neuraxial anesthesia.

STEP 4 — Decide

If thrombotic risk is high and bleeding risk is low/moderate, initiate pharmacologic prophylaxis (e.g., enoxaparin 40 mg SC daily or unfractionated heparin 5000 units SC q8h) starting pre-op and continue until ambulatory or discharge; if thrombotic risk is moderate and bleeding risk low, consider pharmacologic prophylaxis or mechanical compression devices; if bleeding risk high, use mechanical prophylaxis only and hold pharmacologic agents until bleeding risk resolves.

Clinical Guardrails / Mimics / Pitfalls

Do not administer pharmacologic prophylaxis in patients with active bleeding, severe thrombocytopenia, or contraindications to anticoagulants; avoid neuraxial blockade while on therapeutic anticoagulation; monitor for heparin-induced thrombocytopenia if heparin used >4 days; ensure timely discontinuation post-op to prevent bleeding; mechanical prophylaxis alone is insufficient for high thrombotic risk.

Concrete Clinical Example

A 48-year-old man with ectopic ACTH syndrome scheduled for laparoscopic adrenalectomy. He has a prior provoked DVT, BMI 32, and no bleeding disorder. Thrombotic risk high (major surgery + prior VTE), bleeding risk low. Start enoxaparin 40 mg SC daily pre-op and continue for 7 days post-op until ambulatory.

Source: Treatment of Cushing’s Syndrome: An Endocrine Society Clinical Practice Guideline, Nieman et al., Endocrine Society, 2015, DOI:10.1210/jc.2015-1818