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They are generally soft to the touch, movable, and painless. [1] They usually occur just under the skin, but occasionally may be deeper. [1] Most are less than 5 cm (2.0 in) in size. [2] Common locations include upper back, shoulders, and abdomen. [4] It is possible to have several lipomas. [3] The cause is generally unclear. [1]
A dermatofibroma, or benign fibrous histiocytomas, is a benign nodule in the skin, typically on the legs, elbows or chest of an adult. [3] It is usually painless. [3]It usually ranges from 0.2cm to 2cm in size but larger examples have been reported. [3]
The first noticeable symptom is usually a painless lump or swelling. As the tumor grows, it may cause other symptoms, such as pain or soreness, as it presses against nearby nerves and muscles. If in the abdomen it can cause abdominal pains commonly mistaken for menstrual cramps, indigestion, or cause constipation.
Symptoms of soft-tissue sarcomas vary, but they often present as firm, oftentimes painless lumps or nodules. [2] Gastrointestinal stromal tumors (GIST, a subtype of soft-tissue sarcoma) often are asymptomatic, but can be associated with vague complaints of abdominal pain, bleeding into the intestines, a feeling of fullness, or other signs of ...
MLS typically presents as a large (1 to 39 cm; average 12 cm), mobile, well-circumscribed, painless mass that developed from 1 week to 15 years prior to diagnosis. MLS tumors are located in deep-seated soft tissues of the thighs (65–80% of cases), lower legs (10–15% of cases), retroperitoneum (8% of cases), and arms (5% of cases).
The hard fibroma (fibroma durum) consists of many fibres and few cells, e.g. in skin it is called dermatofibroma (fibroma simplex or nodulus cutaneous). [2] A special form is the keloid , which derives from hyperplastic growth of scars .
Clinically, the lesion is observed as a hard, well-circumscribed, lobulated, round to oval, or fibrous mass that has a sparkling gray-to-white aspect and appears fibrous on the cut surface. [3] Patients with these tumors often appear with a history of a painless, slowly developing mass, often over a reasonably lengthy period of time.
Erythema nodosum (EN) is an inflammatory condition characterized by inflammation of subcutaneous fat tissue, resulting in painful red/blue lumps or nodules that are usually seen symmetrically on both shins, on the thighs, arms, and elsewhere. [1] It can be caused by a variety of conditions but 20 to 50% of cases are idiopathic.