A<unk>  (from Greek hamartion “bodily defect”) is a focal malformation that resembles a neoplasm in the tissue of its origin.<unk>  is a non-malignant tumor, and it grows at the same rate as the surrounding tissues. It is composed of an overgrowth of mature cells and tissues that normally occur in the affected area. They emerge in many different parts of the body and are most often asymptomatic and undetected unless seen on an image taken for another reason (incidentaloma). The most common<unk> s occur in the lungs. About 5–8% of all solitary lung nodules, and about 75% of all benign lung tumors, are<unk> s.<unk> s mostly arise from connective tissue and are generally formed of cartilage, fat, and connective tissue cells, although they may include many other types of cells.<unk> s must be differentiated from other diseases that cause abnormal tissue growth and calcification, such as calcified metastases and lipomas. Surgery is the mainstay of treatment for<unk> s.
Hamartoma
Thecoma
Cylindroma
Syringoma
Trichoblastoma
Ganglion cyst
Pilomatricoma
Littoral cell angioma