Ovarian cancer surgery often extends beyond the pelvis into the upper abdomen, including the underside of the diaphragm. When ascites is present or disease may have spread upward, surgeons may take a small biopsy from the diaphragm surface, strip the thin peritoneal layer covering it, or in some cases remove a full-thickness section of muscle and repair it. These are standard options aimed at removing as much visible disease as possible, but they can leave behind an area that is thinner than the original tissue or held together by a suture line.
The diaphragm moves with every breath and separates two compartments with different pressures. When abdominal pressure repeatedly rises — coughing, straining with constipation, lifting heavy objects — organs can push upward through a weakened or reopened area. On the right side, the liver sits directly beneath the diaphragm and is often the first structure to move, which radiologists may describe as a portion of the liver bulging above the diaphragmatic line. On the left, the stomach, colon, or spleen may be involved instead. This is broadly called a diaphragmatic hernia, and cases discovered long after surgery or trauma have been reported.
A bulge on imaging does not have a single meaning. It generally falls into three categories. First, a true hernia, where a defect exists and an organ has passed through it. Second, eventration, where there is no defect but the muscle itself has thinned or lost function through nerve injury, so the whole dome rides higher. Third, a new nodule or residual disease at that site, which raises the question of recurrence. Because management differs completely among the three, the useful question is not simply what is visible, but where the diaphragmatic outline is interrupted and what crosses that gap.
This is why imaging often proceeds in steps rather than settling the matter in one study. A non-contrast CT offers little density difference between liver tissue and neighboring structures, making the border hard to define. PET-CT is limited here because normal liver already takes up a substantial amount of the glucose tracer, reducing contrast in that region, and respiratory motion can blur the area. A request to repeat the scan with contrast usually does not mean the earlier study was flawed; it is the next step, using vascular enhancement and coronal and sagittal reconstructions to locate the exact point where the diaphragm loses continuity. MRI, or fluoroscopy that shows whether the diaphragm descends normally during inspiration, may be added when needed.
Symptoms can add context. Sharp intermittent pain under the right ribs, discomfort that changes with position, fullness after meals, occasional nausea and vomiting, or pain radiating to the shoulder tip (the nerve supplying the diaphragm shares a pathway with shoulder sensation) are worth recording with dates and patterns rather than dismissing as slow recovery. That said, adhesions, intercostal nerve irritation, and ordinary digestive problems can produce the same complaints, so symptoms alone cannot settle the diagnosis.
One distinction matters urgently. If herniated tissue becomes trapped in a narrow opening or loses its blood supply, timing becomes critical. Sudden severe upper abdominal or chest pain, persistent vomiting, complete absence of gas and stool, shortness of breath, cold sweats, and a rapid pulse together warrant an emergency department visit rather than waiting for the next appointment. At the other end of the spectrum, a small defect with no symptoms and only slight liver displacement may reasonably be watched with interval imaging instead of immediate surgery.
When repair is indicated, the defect is closed with sutures or reinforced with mesh. Whether the approach is laparoscopic, open abdominal, or through the chest depends on the location and size of the defect, adhesions, overall fitness, and the chemotherapy schedule. These decisions are frequently made jointly by gynecologic oncology, general or thoracic surgery, and radiology rather than by one team alone.
A practical order of preparation before the clinic visit: first, check the operative report for exactly what was done to the diaphragm — biopsy, stripping, or full-thickness resection, which side, and whether it was sutured or reinforced. Second, bring outside imaging discs and reports so previous and current scans can be compared side by side. Third, write a dated log of when pain began, which positions and movements worsen it, when vomiting occurred and how often, and bowel patterns. Fourth, prepare questions: can the current images distinguish hernia from recurrence, what would make surgery necessary, when is the next check if watchful waiting is chosen, and which activities should be avoided meanwhile.
Running a radiology report through an AI tool before an appointment is not inherently wrong, but the output is material for better questions, not a diagnosis. The same wording can mean different things depending on what was actually done in the operating room and how the borders appear on the images. The people holding the answer are the clinicians who performed the surgery and can view the scans directly.
This article provides general health information and does not replace individual diagnosis or treatment. Please discuss your symptoms, test results, and any treatment decisions with your own medical team.