What Are Hand Masses and Tumors?Lumps and bumps in the hand are very common. Fortunately, most of these are benign (not cancer). These are generically referred to as tumors. Tumors can occur on the skin, such as a mole or a wart, or underneath the skin in the soft tissue or even the bone. Because there are so many types of tissue in the hand (e.g. skin, fat, ligaments, tendons, nerves, blood vessels, bone, etc.), there are many types of tumors that can occur. Depending on the type, a mass or cyst may or may not produce symptoms. The most common hand masses are:
- Ganglion cysts are benign fluid-filled masses that are typically seen on the wrist, hand, and fingers. This is most common mass occurring in the hand. There are several treatment options for a ganglion cyst, including observation (doing nothing), aspiration (puncturing with a needle) or surgically removing it.
- Dupuytren’s nodules are hard, visible knots that form due to the thickening of the tissue beneath the skin in the palm of the hand. They are often painless, but may cause discomfort with gripping. Nodules themselves do not alter function; however, development of a chord may lead to contracture of the finger.
- Epidermal inclusion cysts are benign and form just underneath the skin where there may have been a cut or puncture. The cyst is filled with keratin, a soft, waxy material.
- Giant cell tumors of the tendon sheath are benign tumor masses most commonly found on the palmar surface of index, middle, and ring fingers. Over time, some giant cells tumors of the tendon sheath may become symptomatic and need to be excised.
There are other less common types of tumors seen in the hand, including lipomas (fatty tumors), neuromas (nerve tumors), nerve sheath tumors, fibromas, and glomus tumors, among others. Almost all are benign.