Adipocytic tumors Lipoma Differential diagnosis: Atypical lipomatous tumor/well-differentiated liposarcoma Clinical features Lipoma represents the most common mesenchymal soft tissue tumor of adults. Most commonly, lipomas are localized to the subcutaneous adipose tissue, presenting as a painless mass/swelling, although examples may…
Diseases of joints Primary degenerative joint disease Differential diagnosis: Secondary degenerative joint disease of any cause Clinical features Primary degenerative joint disease (DJD) is the most common form of arthritis and causes progressively worsening pain, swelling, and lack of mobility…
Introduction Bone is one of the most common anatomic sites for metastases, along with the lungs and liver, and metastases are the most commonly diagnosed neoplasms encountered in the skeleton. Metastases are far more frequent in bone than are primary…
Fibrous Dysplasia Clinical Features Fibrous dysplasia is a benign proliferation of fibro-osseous tissue that may be diagnosed at any age; most manifest in the second to third decades of life ( Table 24.1 ). Males and females are affected equally, and…
Introduction A variety of cystic lesions may arise within bone ( Table 23.1 ). Additionally, many neoplasms may undergo secondary cystic changes, and adequate tissue sampling is therefore essential ( Table 23.2 ). In this chapter, we will address the clinical, radiographic,…