Benign tumor types
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Overview of Benign Tumor Types
Benign tumors are non-cancerous growths that remain localized and do not invade nearby tissues or spread to distant parts of the body. They typically grow slowly, have well-defined borders, and are less likely to recur after removal. However, some benign tumors can cause health problems if they grow large enough to compress nearby structures or, in rare cases, transform into malignant tumors Patel2020Sinha2018.
Benign Bone Tumors: Types and Features
Benign bone tumors are most common in children and young adults and are often found incidentally during imaging. The main types include:
- Bone-forming tumors: Osteoid osteoma, osteoblastoma, fibrous dysplasia, and enostosis.
- Cartilage-forming tumors: Osteochondroma (the most common, accounting for 30–35% of benign bone tumors) and enchondroma.
- Other types: Giant cell tumor, aneurysmal bone cyst, and simple bone cyst Lam2020De Salvo2022Hakim2015+1 MORE.
Most benign bone tumors are asymptomatic, but some can cause pain or swelling and may require surgical intervention. Malignant transformation is rare, but regular monitoring is recommended Lam2020De Salvo2022Hakim2015.
Benign Soft-Tissue Tumors: Common Types
Benign soft-tissue tumors are frequently encountered in clinical practice, especially in young adults. The most common types are:
- Lipomas: The most prevalent, making up over half of benign soft-tissue tumors.
- Vascular tumors: Such as hemangiomas.
- Peripheral nerve sheath tumors: Including schwannomas and neurofibromas.
- Fibrous tumors, fibrohistiocytic tumors, and smooth muscle tumors: Less common .
These tumors most often occur in the extremities, followed by the head and neck region .
Benign Tumors in the Mediastinum
Benign tumors in the mediastinum (the area between the lungs) are diverse and can be grouped as:
- Cystic tumors: Such as bronchogenic cysts, esophageal cysts, enteric cysts, pericardial cysts, pleural cysts, and thymic cysts.
- Solid tumors and tumor-like conditions: Including sclerosing mediastinitis, thymic hyperplasia, adenomatoid tumor, glomus tumor, cholesteroloma, perivascular epithelioid cell tumor (PEComa), and sclerosing hemangioma.
- Histiocytic tumors: Such as Langerhans cell histiocytosis and Rosai-Dorfman disease .
Benign Brain Tumors
Common benign brain tumors include:
- Meningioma
- Glioma
- Pituitary adenoma
These tumors can be identified and classified using imaging techniques and advanced computational methods .
Benign Follicular Tumors of the Skin
Benign follicular tumors are skin neoplasms that resemble parts of the normal hair follicle. Types include:
- Dilated pore of Winer
- Pilar sheath acanthoma
- Trichoadenoma
- Trichilemmoma
- Infundibuloma
- Proliferating trichilemmal cyst/tumor
- Trichoblastoma
- Pilomatricoma
- Trichodiscoma/fibrofolliculoma
- Neurofollicular hamartoma
- Trichofolliculoma
Some syndromes, such as Cowden and Birt-Hogg-Dubé, are associated with multiple benign follicular tumors .
General Characteristics and Clinical Relevance
Benign tumors are usually not life-threatening but can cause symptoms due to their size or location. Examples include uterine fibroids and skin lipomas. Some benign tumors, like colon polyps, have the potential to become malignant and are monitored or removed as a precaution Patel2020Sinha2018.
Conclusion
Benign tumors encompass a wide range of types, affecting various tissues such as bone, soft tissue, brain, mediastinum, and skin. While they are generally non-aggressive and do not spread, their clinical significance depends on their size, location, and potential for rare malignant transformation. Regular monitoring and, in some cases, surgical removal are important for management and prevention of complications Kalhor2019Lam2020Ingale2021+5 MORE.
Sources and full results
Most relevant research papers on this topic
Combination of DWT Variants and GLCM as a Feature for Brain Tumor Classification
Combining DWT and GLCM features in MRI images improves the accuracy of classifying benign brain tumors, with an average accuracy of 78.03% in all data categories.
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