Author: Andrew Parker, MD
Andrew Parker, MD
Dr. Andrew Parker is a board-certified internal medicine physician with over 10 years of clinical experience. He earned his medical degree from the University of California, San Francisco (UCSF), and has worked at leading hospitals including St. Mary’s Medical Center. Dr. Parker specializes in patient education and digital health communication. He now focuses on creating clear, accessible, and evidence-based medical content for the public.
Stage 2 Stomach Cancer: Causes, Symptoms, and Treatment Options Stage 2 stomach cancer is the point at which cancer cells have penetrated the muscular layer of the stomach wall and have spread to nearby lymph nodes, but have not yet metastasized to distant organs. Detecting stomach cancer at this stage is crucial, as timely diagnosis and treatment can help stop the disease from progressing and reduce the risk of serious complications. Overview of Stage 2 Stomach Cancer The stomach is a vital organ of the digestive system located between the esophagus and the small intestine. Its primary role is to…
Meningioma: Causes, Symptoms, and Treatment Meningioma is a type of tumor that develops from the meninges — the protective membranes covering the brain and spinal cord. Although it is not a primary brain tumor, it can compress adjacent brain tissue, cranial nerves, and blood vessels. Most meningiomas grow slowly and are often asymptomatic, so immediate treatment may not always be necessary; however, regular monitoring is crucial. Understanding Meningioma What is Meningioma? A meningioma is a tumor that arises from the meninges, the membranes surrounding the brain and spinal cord. While it is not considered a primary brain tumor, it can…
Signet Ring Cell Carcinoma: Symptoms and Treatment Options Signet ring cell carcinoma (SRCC) is an aggressive form of adenocarcinoma that originates from glandular epithelial cells lining organs in the gastrointestinal tract. Although the stomach is the most common primary site, SRCC can also develop in other locations such as the colon, rectum, pancreas, bladder, or esophagus. Because of its diffuse growth pattern, this cancer is often diagnosed at an advanced stage, which makes treatment more challenging. Standard approaches typically include surgery, chemotherapy, and in some cases targeted or combination therapies. What is Signet Ring Cell Carcinoma? The term “signet ring”…
Urothelial Carcinoma: Causes, Symptoms, and Treatment Urothelial carcinoma (also known as transitional cell carcinoma) is a malignancy arising from the lining of the urinary tract. It accounts for about 90% of all bladder cancers and roughly 7% of kidney cancers. When diagnosed at an early stage, it is usually highly treatable, but recurrence is common. What Is Urothelial Carcinoma? This cancer originates from urothelial cells – the epithelial lining of the urinary tract, including the bladder, renal pelvis, and ureter. Because this lining is exposed to urine and potentially harmful substances filtered by the kidneys, it is particularly prone to…
Perivascular Cell Tumor: Causes, Symptoms, and Treatment Perivascular cell tumors are a type of soft tissue sarcoma that originate from the pericytes-cells surrounding the walls of capillaries. These tumors most frequently develop in the head and neck region. When they occur within the nervous system, they are not true meningiomas but can still exert significant adverse effects on the brain. Overview of Perivascular Cell Tumors What are Perivascular Cell Tumors? Hemangiopericytoma (HPC) is a tumor that develops from soft tissue and the blood vessels embedded within that tissue. It can arise anywhere in the body where blood vessels are present,…
Thymoma: Causes, Symptoms, and Treatment What is Thymoma? Thymoma is a rare tumor that arises from the epithelial cells lining the outside of the thymus gland. The thymus is a small organ located in the chest above the heart and beneath the breastbone. It is part of the lymphatic system and plays a role in producing lymphocytes (white blood cells) that help fight infections. Thymomas are often discovered incidentally on chest X-rays performed for other health reasons. Key features of thymoma include: Cell characteristics: Cancer cells look similar to normal thymus cells, grow slowly, and rarely spread beyond the thymus.…
Squamous Cell Carcinoma: Symptoms, Causes, Diagnosis and Treatment Squamous cell carcinoma (SCC) is a type of skin cancer that arises from the uncontrolled growth of squamous cells in the epidermis—the outermost layer of the skin. Long-term exposure to ultraviolet (UV) rays from sunlight is the main risk factor. Early detection and treatment can lead to positive outcomes for most patients. What Is Squamous Cell Carcinoma? Squamous cell carcinoma (also called cutaneous squamous cell carcinoma) is the second most common type of skin cancer after basal cell carcinoma. It originates from squamous cells in the epidermis and most often develops on…
What is chondrosarcoma? Symptoms, causes, diagnosis and treatment Chondrosarcoma is a type of bone cancer belonging to the group of connective tissue cancers. It is a rare condition that originates from the transformation of cartilage tissue in the body. Common symptoms may include bone pain, the formation of lumps or swelling in a particular area of the body, and fatigue. The most common treatment usually starts with surgery to remove the tumor, which may be followed by reconstructive surgery. According to statistics, about 79% of people with chondrosarcoma survive at least five years after being diagnosed. Overview of Chondrosarcoma What…
What is Angiosarcoma? Causes, Symptoms, Diagnosis, and Treatment Angiosarcoma is a rare and aggressive form of soft tissue sarcoma that originates in the inner lining (endothelium) of blood vessels or lymphatic vessels. Although it can develop almost anywhere in the body, it most frequently appears on the skin—particularly on the scalp, head, neck, or chest. Less commonly, it may form inside internal organs such as the heart, liver, or spleen. These tumors are malignant and have a high tendency to recur after treatment. Understanding Angiosarcoma Because blood vessels and lymphatic vessels exist throughout the body, angiosarcoma can develop in multiple…
Connective Tissue Cancer (Sarcoma): Symptoms, Causes, Diagnosis and Treatment Connective tissue cancer, or sarcoma, is a rare type of cancer that develops in bones or connective tissues such as muscles, fat, nerves, blood vessels, and tissues adjacent to bones and joints. Symptoms depend on the tumor’s size and location. Treatment may include surgery, chemotherapy, radiation therapy, immunotherapy, or targeted therapy. General Overview What is Connective Tissue Cancer? Connective tissue cancer (sarcoma) is a malignancy arising in soft tissue or bone – both of which provide structural support for the body. Soft tissue includes: Muscles Fat Tendons Ligaments Blood vessels Nerves…