<unk>  dorsi is a rare, slow growing, ill-defined soft tissue mass of the chest wall. It occurs most in the periscapular region.Elastofibroma was first discovered by Jarvi and Saxen, in 1961.<unk>  dorsi is a rare, slow growing, ill-defined soft tissue mass of the chest wall. It occurs most in the periscapular region. It is commonly located beneath latissimus dorsi and rhomboid major muscles near to the inferior angle of the scapula. It is a benign neoplasm with clinical appearance of a malignant tumor. The exact pathogenesis of<unk>  dorsi is not fully understood. It is thought that<unk>  dorsi is the result of subclinical microtrauma, reactive hyperplasia of elastic fibers and increased production of fibrous tissue. The area between thoracic wall and scapula is the area of maximum and repeated friction and it was postulated as one of the reason of pathogenesis of<unk> .<unk>  often has bilateral location in the thoracic wall. On gross pathology, characteristic findings of<unk>  include solitary, poorly circumscribed, heterogeneous, soft-tissue mass. On microscopic histopathological analysis, characteristic findings of<unk>  include Eosinophilic, beaded elastic fibers with Verhoeff's elastic stain. many fragmented fibers with appearance of beads on a string can be seen also.<unk>  dorsi must be differentiated from lipoma, desmoid tumours, neurofibroma and liposarcoma. The prevalence of<unk>  is approximately 11200 in men and 24400 in women per 100,000 individuals in each gender autopsies.<unk>  commonly affects elderly female and age can be ranging from 35-94 years. The  female to male ratio is approximately 2.1. The majority of<unk>  cases are reported in Japan. The majority of patients with<unk>  dorsi are asymptomatic.<unk>  may present with painless swelling, pain (less than 10% of patients), scapular snapping, limitation of motion, clunking sensation in the shoulder adduction-abduction movement. Patients with<unk>  usually appear normal and physical examination findings of<unk>  can include limited range of motion and swelling. An x-ray may be helpful in the diagnosis of<unk>  and the findings include soft tissue density in the periscapular region. X-ray may be normal. CT scan may show a heterogenous soft tissue mass with poorly defined margins.Magnetic resonance imaging is the first diagnostic tool for diagnosis of<unk>  dorsi. Findings on MRI suggestive of<unk>  include solitary heterogeneous, poorly circumscribed, soft-tissue mass which is isointense to muscle in T1 and T2WI images.Positron emission tomography/computed tomography (PET/CT) may show low to moderate metabolic activity in these patients. PET/CT shows low-grade diffuse 18F fluorodeoxyglucose uptake. Needle aspiration biopsy confirms the diagnosis exclude sarcoma. Surgical resection is considered only in symptomatic cases.
Elastofibroma
Dermatofibroma
Chondromyxoid fibroma
Medulloepithelioma
Fibroma
Angiofibroma
Dermatofibrosarcoma
Dermatofibrosarcoma protuberans