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For example, benign tumors are mostly well differentiated and malignant tumors are often undifferentiated. However, undifferentiated benign tumors and differentiated malignant tumors can occur. [28] [29] Although benign tumors generally grow slowly, cases of fast-growing benign tumors have also been documented. [30]
Cutaneous lipomas are rare in children, but these tumors can occur as part of the inherited disease Bannayan-Zonana syndrome. [ 40 ] [ 41 ] Lipomas are usually relatively small with diameters of about 1–3 cm, [ 42 ] but in rare cases they can grow over several years into "giant lipomas" that are 10–20 cm across and weigh up to 4–5 kg.
They can grow in all organs, arising from mesenchyme tissue. The term "fibroblastic" or "fibromatous" is used to describe tumors of the fibrous connective tissue. When the term fibroma is used without modifier, it is usually considered benign, with the term fibrosarcoma reserved for malignant tumors.
Liver tumors (also known as hepatic tumors) are abnormal growth of liver cells on or in the liver. Several distinct types of tumors can develop in the liver because the liver is made up of various cell types. [1] Liver tumors can be classified as benign (non-cancerous) or malignant (cancerous) growths.
Vaginal tumors are neoplasms (tumors) found in the vagina.They can be benign or malignant. [1] [a] A neoplasm is an abnormal growth of tissue that usually forms a tissue mass.[2] [3] [4] Vaginal neoplasms may be solid, cystic or of mixed type.
The spindle-shaped cells are benign tumor cells that in almost all cases have chromosome abnormalities that are thought to contribute to their abnormal development and/or growth. [3] AFST tumors are commonly treated by surgical excision although in uncommon cases they recur at the site of their removal and require further surgical treatment. [2]
Collagenous fibroma, also known as desmoplastic fibroblastoma, is a slow-growing, deep-set, benign fibrous tumor, usually located in the deep subcutis, fascia, aponeurosis, or skeletal muscle of the extremities, limb girdles, or head and neck regions.
Human Tooth Diagram. Cementoma is an odontogenic tumor of cementum.It is usually observed as a benign spherical mass of hard tissue fused to the root of a tooth. [1] It is found most commonly in the mandible in the region of the lower molar teeth, occurring between the ages of 8 and 30 in both sexes with equal frequency . [1]