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Yan Chun
Oncology
About me
Graduated from the Clinical Medicine Department of Qingdao Medical College, has been working in the Oncology Department since 2001, obtained the qualification of attending physician in the same year. Promoted to attending physician in 2003. Qualified as associate chief physician in 2011. Participated in advanced studies at Jinan Cancer Hospital from June to November 2015. Serves as a youth member of the Chemical Therapy Committee in Shandong Province, youth member of the Elderly Therapy Committee of the Qingdao Anti-cancer Association, and a member of the Biologic Therapy Committee of the Qingdao Anti-cancer Association.
Proficient in diseases
Chemotherapy, radiotherapy, deep hyperthermia, targeted therapy, and endocrine therapy for various tumors such as stomach cancer, colorectal cancer, lung cancer, breast cancer, ovarian cancer, and pancreatic cancer.
Voices
Early symptoms and signs of pancreatic cancer
Pancreatic cancer is a malignant tumor of the digestive system and does not have a high clinical incidence rate. Early symptoms of pancreatic cancer are not typical; some patients experience abdominal pain, primarily a persistent episodic pain that may radiate to the shoulder and back. Additionally, early-stage pancreatic head cancer patients may exhibit jaundice, often caused by obstructive jaundice due to tumor compression. Besides this, patients may also have clay-colored stools or urine the color of strong tea. Beyond these symptoms, early-stage patients exhibit no other signs. When typical clinical manifestations occur, they are generally indicative of mid to late-stage pancreatic cancer. Precursors to pancreatic cancer include persistent hidden pain in the shoulder or a stiff pain in the back. This continuous pain, often caused by the invasion of the abdominal nervous plexus, results in radiating pain.
How is pancreatic cancer caused?
Currently, there is no consensus in clinical practice regarding the causes of pancreatic cancer, but some studies have found that certain factors contribute to its high incidence. For example, patients with diabetes have a higher incidence of pancreatic cancer compared to those without diabetes, and having chronic pancreatitis and other diseases also leads to a higher occurrence of pancreatic cancer. Additionally, factors such as genetic mutations are also associated with the development of pancreatic cancer. Some research has found that there is a certain correlation between genetic factors and the occurrence of pancreatic cancer. Once pancreatic cancer develops, it leads to a variety of symptoms in clinical settings.
Can a cystic lesion in the liver be liver cancer?
Clinically, cystic lesions in the liver are mostly not liver cancer lesions, because liver cancer is a malignant tumor occurring in the liver. Clinically, on imaging, it is mainly manifested as occupying lesions in the liver, appearing as multiple hepatic nodules fused into a mass, or as a huge single nodular lesion. These lesions generally appear as solid lesions. When the tumor is large, ischemic necrosis can occur due to insufficient blood supply to the central area, resulting in cystic changes in the central region of the solid lesion. Therefore, some patients with large liver cancer may have cystic and solid lesions on imaging, but in most cases, liver cancer lesions are solid.
Does pancreatic cancer cause bloody stools?
Patients with pancreatic cancer may exhibit clinical symptoms of bloody stools, and the possible causes are as follows: First, the lesion of pancreatic cancer invades organs and tissues such as the gastrointestinal tract, causing damage to the mucous membranes, which clinically results in bloody stools. Second, if the pancreatic cancer metastasizes to the liver, liver function is impaired. Some patients may develop hyperactive splenic function, leading to a decline in platelet counts. When platelet levels drop to a certain extent, spontaneous visceral bleeding can occur, which may also manifest as bloody stools clinically. Third, in the late stages of pancreatic cancer, the disease may cause metastasis to multiple organs, leading to the complication of disseminated intravascular coagulation. This results in impaired coagulation function, making gastrointestinal bleeding likely, which is also clinically manifested as bloody stools.
Does melanoma feel painful when pressed?
Melanoma is a highly malignant skin cancer, and clinically, some patients may experience pain when pressing on the lesion area. The reason for the pain is mainly due to the rapid growth of the melanoma, leading to compression of local tissues or the optic nerve and urgency, resulting in a painful sensation. This pain can exist even without pressing, and ulcerative lesions can occur in some affected areas, leading to symptoms such as pain, bleeding, and infection. In addition to pain upon local compression, patients with melanoma may also experience inflammatory changes such as redness, swelling, heat, and pain, causing some clinical symptoms of fever.
Kidney cancer most commonly metastasizes to which locations?
Kidney cancer clinically tends to metastasize through direct spread, the lymphatic pathway, and the hematogenous pathway. The lymphatic route often involves enlargement of the perirenal lymph nodes or the lymph nodes in the groin or retroperitoneum. Kidney cancer is also prone to metastasize to the lungs, liver, bones, and other parts via the bloodstream. Similarly, kidney cancer can spread to the perirenal area, ureters, bladder, and other parts through direct extension. Once kidney cancer metastasizes to other organs, it is considered to be in the advanced stages clinically, and treatment primarily involves targeted therapy, chemotherapy, and other comprehensive treatment measures, with surgical treatment not being used as the primary anti-tumor treatment. Once kidney cancer has metastasized, the clinical staging is late, and the prognosis for the patients is poor.
Does early-stage liver cancer metastasize?
Patients with early-stage liver cancer generally do not experience metastasis. This is because for patients with early-stage liver cancer, the lesions are localized and have not spread, thus being classified as early-stage. Moreover, the general treatment for patients with early-stage liver cancer involves curative surgery. Since the lesions are localized, in most cases, there will be no recurrence or metastasis after the surgery. Therefore, for early-stage patients, there is no need to administer adjuvant radiotherapy or adjuvant chemotherapy and other anti-tumor treatments after the surgery. However, once the liver cancer lesions invade surrounding tissues and metastasize to distant sites, it indicates that the lesions have spread, and the clinical stage has progressed to mid or late stages, losing the opportunity for curative surgery. Most patients undergo comprehensive treatments such as radiotherapy, chemotherapy, and targeted therapy which generally results in a reduction in survival time.
Will prostate cancer embryonic antigen rise?
Prostate cancer is a common malignant tumor in the male urinary system. In some patients with prostate issues, there may be an increase in the carcinoembryonic antigen index in blood tests, but not all patients will exhibit this marker increase. Most prostate cancer patients will show an increase in the prostate-specific antigen (PSA) in blood tests, or there may be abnormal ratios of free PSA to bound PSA. Carcinoembryonic antigen and prostate-specific antigen are tumor markers for prostate cancer, but they only provide auxiliary value for diagnosis and do have some evaluative value regarding the effectiveness of anti-tumor treatment. Additionally, they can serve as a monitor for the condition of prostate cancer. Clinically, to confirm a diagnosis of prostate cancer, it is necessary to rely on the results of pathological tissue obtained through biopsy.
Early symptoms and manifestations of pancreatic cancer
Pancreatic cancer is a type of malignant tumor that has seen an increase in incidence in recent years. The early symptoms and signs of pancreatic cancer include the following: many patients experience abdominal pain, which often radiates to the shoulder and back. Additionally, some patients with early-stage pancreatic cancer may develop jaundice in the skin and mucous membranes, and some may even exhibit bleeding spots. Moreover, some patients with early-stage pancreatic cancer may show symptoms of indigestion, experiencing repeated belching, nausea, and loss of appetite. Furthermore, the symptoms of early-stage pancreatic cancer are generally not typical because the tumor is located deep within the body and is small, hence it does not invade surrounding tissues. Therefore, the clinical symptoms are neither severe nor diverse.
How to determine if a hemangioma is regressing
Clinically, hemangiomas are a type of benign tumor that mostly require medication, surgery, or local treatments to regress. In rare cases, hemangiomas can regress spontaneously, especially when they are small and the underlying cause of the hemangioma has been removed. Then, the color of the hemangioma may change from its original dark red to a bright red, and gradually change to a color similar to that of normal skin, indicating that the hemangioma has regressed. Clinically, depending on the impact of the hemangioma on the patient, treatment options can include medication, local microwave therapy, laser treatments, or surgical removal.