N ephrotic syndrome (NS) is a primary glomerular disease. The earliest recorded description of NS was from the 15 th century. The concept of "nephritis in contrast to nephrosis" was further popularized by Volhard et al. It was used to describe a major classification of bilateral renal disease. Now, NS is recognized as a common chronic illness in childhood. It is characterized by proteinuria defined by urine protein >3.5 g/24 h or urine protein-creatinine ratio >2 mg protein/mg creatinine, edema, hyperlipidemia (>200 mg/dl), and hypoalbuminemia. Hypoalbuminemia causes increased production of coagulation factors in the liver which leads to a hypercoagulable state and an increased risk of thrombotic events, including pulmonary embolism (PE) [1,2]. NS is a hypercoagulable state associated with venous and rarely, arterial thromboembolism with an estimated risk of up to 1.8-5% [3,4]. It involves abnormalities in fibrin formation and platelet aggregation, vascular stasis, loss of antithrombin III, Protein C and S in urine, and increased production of fibrinogen [5]. Thromboembolic events can occur in both venous and arterial territories. The more frequently involved are the cerebral venous sinuses and middle cerebral arteries, deep veins of the lower limbs, vena cava, renal and hepatic veins, pulmonary, and mesenteric artery [6]. PE may present with minimal clinical signs or may be asymptomatic for life and lead to sudden death. Here, we describe the subtle presentation of a massive PE in a boy with steroid-dependent NS. CASE REPORT A 10-year-old male child who was a known case of NS reported to our department with edema over bilateral eyelids and lower limbs and cough and cold for 7 days which was associated with intermittent episodes of chest pain and shortness of breath. He was diagnosed with NS at 2 years and had started with prednisolone. Since then, the patient had three episodes of relapse. The patient was on prednisolone therapy with a dosage of 40 mg/m 2 daily at the time of admission. On physical examination, the patient had mild edema at the extremities and tachypnea (respiratory rate 36/min). The body temperature was 37°C, blood pressure 106/72 mm-Hg, heart rate 85-95 bpm, and oxygen saturation were 98% (at room air). Urinalysis showed 4+ of protein on the dipstick and urinary protein/creatinine ratio was 14 mg/mg. Blood investigations revealed hemoglobin of 15.6 g/dL with hematocrit 45.2%, platelet count 173000/μL, total leukocyte count 11400/mm 3 , low serum albumin 2 g/dl, raised total cholesterol 598 mg/dl, and raised serum triglycerides 300 mg/dl. There was difficulty in breathing. Chest X-ray was suggestive of bilateral hilar prominence which led to a differential diagnosis of PE which is a known complication of NS. Hence, D-dimer test was done where elevated levels of 9.98 μg/mL (<0.5 μg/mL) were observed, along with a coagulation profile which was normal with prothrombin time 13.3 s, activated partial thromboplastin time 32, and international normalized ratio