SHENZHEN – A routine school run ended in emergency surgery for an 11-year-old girl after doctors discovered a massive ovarian tumour in her abdomen—so large it weighed as much as a full-term newborn baby.
The child, identified only by the pseudonym Xiao Yu, was rushed to the Shenzhen Children’s Hospital in early June after she felt a sharp pain in her lower left abdomen while jogging during physical education class. What initially seemed like simple exercise discomfort soon became a terrifying medical emergency.
A CT scan revealed a colossal mass in her pelvic and abdominal cavity, measuring roughly 200mm by 99mm by 286mm—with a maximum diameter of about 29 centimetres. At the time of diagnosis, her umbilical abdominal circumference had ballooned to 80 centimetres, and doctors suspected a giant ovarian teratoma on her right ovary.
A Silent Growth Mistaken for Puberty
Xiao Yu’s family had previously attributed her expanding waistline to normal puberty-related weight gain. However, the sudden onset of abdominal pain after running prompted further investigation, which uncovered the true condition. The tumour had already compressed surrounding organs and posed a serious risk of rupture or torsion, making immediate surgery essential.
The operation, which lasted over three hours, involved the removal of a tumour weighing approximately 4 kilograms—equivalent to the weight of a full-term infant. Due to the tumour’s size and extensive adhesions to the peritoneum, intestines, omentum, and pelvic wall, surgeons opted for a median incision to safely access and remove the mass. To minimise trauma and reduce the risk of rupture, they aspirated nearly 1,000 millilitres of fluid from the cystic portion of the tumour before proceeding with the excision.
Pathology reports later confirmed the growth was an immature teratoma, a type of germ cell tumour. Fortunately, no malignant cells or signs of metastasis were detected in preoperative tumour marker tests.
Recovery and Outlook
Xiao Yu recovered steadily after surgery, with stable vital signs and no post-operative complications. She was discharged eight days later, and follow-up examinations have shown no abnormalities in her abdominal or pelvic regions. Her physical development and growth remain unaffected.
Dr. Ren Feng, head of the Surgical Ward at the Longhua campus of the Shenzhen Children’s Hospital, explained that ovarian teratomas are among the more common germ cell tumours found in children and adolescents. While most are benign, their growth can lead to severe complications—including rupture, infection, or ovarian torsion—especially as they enlarge.
Dr. Ren urged parents to be vigilant about subtle physical signs in their daughters. He highlighted four key warning signs that warrant immediate medical attention:
- Sudden or progressive increase in abdominal girth
- Pant waistbands becoming noticeably tighter
- Abdominal pain during or after physical activity
- A palpable lump or mass in the abdomen
He stressed that early detection through pelvic ultrasound at a qualified healthcare facility can significantly improve treatment outcomes and prevent life-threatening complications.
Why Early Detection Matters
This case highlights a critical gap in paediatric healthcare awareness. Often, abdominal swelling in children is dismissed as weight gain, particularly during puberty. Yet, as Xiao Yu’s experience shows, severe underlying conditions can mask themselves as everyday bodily changes.
Medical experts advise that any unusual, persistent abdominal symptoms should never be ignored. Regular check-ups and timely imaging can mean the difference between a minimally invasive procedure and a complicated open surgery.
For families in Hong Kong and the Greater Bay Area, this serves as a powerful reminder: a child’s “baby fat” or sudden weight gain may be anything but normal. When in doubt, consult a specialist—because sometimes, the most ordinary symptom can be hiding the most extraordinary story.