Linitis Plastica in a Patient with Immune Thrombocytopenia: A Challenging Case

Cancer of the stomach is often a disease of the lining, where abnormal cells grow on the surface and can be seen or sampled with a thin, flexible tube passed down the throat. However, there is a rare and aggressive form of this disease that behaves differently. Instead of staying on the surface, the cancer cells spread deep into the wall of the stomach, infiltrating the layers beneath the lining. This infiltration causes the stomach wall to become thick, stiff, and unable to stretch or expand properly. Because the surface lining often looks relatively normal even when the disease is raging underneath, standard medical tests that only sample the surface can easily miss the diagnosis. This creates a difficult situation for doctors: a patient may be clearly sick, yet the most common tools used to find the cause return a result that says nothing is wrong. Understanding how to look deeper when the surface appears clear is vital for catching this specific type of cancer before it spreads too far to treat.

This challenge is at the heart of a recent case report from a hospital in Portugal, which details the journey of a woman in her fifties who arrived with severe pain, persistent vomiting after eating, and a dramatic weight loss of twenty-five kilograms over seven months. Her medical history included a condition called immune thrombocytopenia, a disorder where the body's immune system mistakenly attacks its own platelets, the blood cells responsible for clotting. At the time of her admission, her platelet count was dangerously low at thirty-six thousand per microliter, a level that makes any invasive procedure risky due to the threat of uncontrolled bleeding. Despite her symptoms, a previous endoscopy performed four months earlier had shown only non-specific irritation and normal tissue, failing to identify the true cause of her suffering.

When the medical team performed a new scan of her abdomen, the images told a different story. The scan revealed that the wall of her stomach was diffusely thickened and that the lower part of the organ was severely narrowed, blocking the passage of food. This finding pointed strongly toward an infiltrative cancer, yet when doctors repeated the standard endoscopy, the camera again showed a stomach that would not stretch and folds that were thickened, but the tiny samples taken from the surface still showed only chronic inflammation. The surface was lying; the disease was hiding beneath it. To solve this puzzle, the team turned to a more advanced technique called endoscopic ultrasound. Unlike a standard camera, this tool uses sound waves to see through the layers of the stomach wall. The ultrasound revealed that the wall was fourteen millimeters thick and had lost its normal layered structure, confirming that something was growing deep inside.

Armed with this new information, the doctors used the ultrasound probe to guide a biopsy needle deep into the thickened wall, bypassing the misleading surface layer. This deep sampling finally captured the cancer cells, identifying them as a poorly differentiated type of adenocarcinoma with signet-ring cells, a specific shape that indicates the cells are not sticking together properly. Further testing showed these cells lacked a specific protein called E-cadherin, which normally acts like glue to hold cells together; without it, the cells spread easily through the tissue. To determine how far the disease had traveled, the team performed a minimally invasive surgical exploration of the abdomen, which confirmed that the cancer had already spread to the lining of the abdominal cavity, a condition known as peritoneal carcinomatosis. This finding meant the cancer was too advanced to be cured with surgery, shifting the goal to managing the disease and improving quality of life.

The path to treatment was complicated by the patient's severe nutritional failure and her low platelet count, which made her vulnerable to infections and bleeding. The medical team placed a feeding tube directly into her small intestine to provide nutrition, allowing her body to recover strength while managing her blood levels. Once her platelets were raised to one hundred thirty-four thousand per microliter, a level considered safe for treatment, she began a course of palliative chemotherapy. This approach was designed not to cure the disease but to slow its growth and relieve symptoms. Over the next four months, she completed five cycles of treatment without major complications. A follow-up scan showed that the thickening in her stomach wall had decreased, suggesting that the medication was working to shrink the tumor mass.

This case illustrates a critical lesson in modern medicine: when a patient's symptoms and imaging results point to a serious problem, but standard surface tests come back negative, doctors must look deeper. The report highlights that relying solely on conventional biopsies can lead to missed diagnoses in cases of this specific stomach cancer, where the disease hides beneath the surface. It also demonstrates that even in complex situations involving advanced cancer and significant blood disorders, a coordinated effort to manage nutrition and blood counts can make systemic treatment possible. The patient's response to chemotherapy, evidenced by the reduction in wall thickness, suggests that targeted medical therapy can still offer benefits even when the disease has spread widely, provided the patient is supported through the physical challenges of the illness.