Poorly Differentiated Squamous Cell Carcinoma of the Regaud–Schmincke Type of the Posterior Pharyngeal Wall: Diagnostic Challenges and Pitfalls
This case report describes a 67-year-old male with a large, exophytic poorly differentiated squamous cell carcinoma of the posterior pharyngeal wall that initially mimicked an inflammatory condition, highlighting the critical need for cross-sectional imaging and repeat histopathological evaluation to avoid diagnostic delays in patients with persistent pharyngeal symptoms.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
The throat is a complex crossroads where air, food, and drink must pass through narrow channels without colliding. When a growth appears there, the body often reacts with inflammation, swelling, and pain, mimicking a common infection. Doctors rely on biopsies, where a small sample of tissue is taken to look for cancer cells under a microscope, to distinguish between a simple sore throat and a serious tumor. However, some tumors are deceptive. They can grow outward in large, fleshy masses that look like benign growths or severe inflammation on the surface, hiding the dangerous cancer cells deep inside. This makes diagnosis difficult, as the initial view can be misleading, and the true nature of the growth may only be revealed through deeper investigation and advanced imaging.
In a recent case report from Sofia, Bulgaria, medical researchers described a patient whose experience highlighted exactly these diagnostic challenges. A 67-year-old man arrived at the hospital complaining of worsening trouble swallowing, a change in his voice, and a persistent feeling that something was stuck in his throat. He had tried antibiotics for these symptoms, but they did not help. When doctors examined his throat, they found a large, polyp-like mass growing from the back wall of his throat. This mass was so large that it extended into the lower throat and nearly blocked the airway. Despite the alarming size of the growth, the first attempt to diagnose it by taking a tissue sample failed. The sample showed only non-specific inflamed tissue and healing cells, leading the medical team to initially believe the problem was a benign inflammatory process rather than cancer.
The turning point came when the medical team turned to a specialized X-ray technique called a computed tomography scan, which uses computer processing to create detailed cross-sectional images of the body. The scan revealed the true scale of the problem: a massive, irregular growth measuring approximately 64 millimeters in length, stretching from the back of the throat down into the lower throat area. The image showed that the mass was not just sitting on the surface but was pushing deep into the surrounding soft tissues, causing significant narrowing of the airway. Because the airway was at risk of closing completely, the doctors performed a protective tracheostomy, creating a temporary opening in the neck to allow the patient to breathe, before proceeding with surgery to remove the tumor.
Once the mass was surgically removed, a second, more thorough examination of the tissue provided the correct answer. The cancer cells were found to be a specific, aggressive type known as poorly differentiated squamous cell carcinoma of the Regaud–Schmincke type. This particular kind of cancer is tricky because, under a microscope, the cancer cells are mixed with a dense crowd of immune cells, making the tumor look very much like a reactive inflammation or a lymphoma rather than a typical skin-like cancer. The initial biopsy had likely only captured the surface layer, which was covered in dead tissue and inflammation, missing the deeper cancer cells that were actually invading the muscle and salivary glands. The patient recovered from the surgery and a brief period of kidney stress, then completed a course of radiation therapy to ensure any remaining microscopic cells were destroyed.
Four months after the operation, the patient was able to breathe through his nose and mouth again without the temporary tube, and follow-up scans showed no signs of the cancer returning. This case serves as a reminder that when a patient has persistent throat symptoms that do not respond to standard treatments, doctors must remain vigilant. A single negative biopsy does not always rule out cancer, especially when a large, unusual mass is present. By combining advanced imaging with repeat tissue sampling and a careful review of the results, medical teams can uncover hidden malignancies that might otherwise be missed, ensuring that patients receive the right treatment at the right time.
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