Diffuse idiopathic skeletal hyperostosis (DISH) is a common condition that affects the spine and peripheral joints, characterized by the progressive ossification of ligaments and tendons. It is a non-inflammatory degenerative disease that affects predominantly the elderly population. It has been associated with reduced mobility and chronic pain, which can have a significant impact on patients’ quality of life (QOL). Although DISH has always been considered a benign condition, patients with DISH report higher levels of pain, stiffness, and disability compared to the general population. It can affect their ability to perform daily activities and participate in social and recreational activities. In addition, extra-spinal manifestations such as enthesopathy and involvement of peripheral joints, but still dysphagia and airway obstruction have been described in DISH. These, although not as common, when present result in signs and symptoms significantly impacting the patient’s QOL. The objective of this review is to assess the QOL in individual with DISH. This involves an examination of various facets of the condition, including pain, spinal and extraspinal manifestations, fractures, and metabolic syndrome.

It has been suggested that diffuse idiopathic skeletal hyperostosis (DISH), a skeletal disease characterized by the ligamentous ossification of the anterolateral spine, is a radiological entity with no clinical implications; however, many patients suffer from chronic back pain, decreased spinal mobility, and postural abnormalities. Additionally, the pathological new bone formation at the cervical and thoracic levels may mainly produce dysphagia and breathing disturbances. Over the last 20 years, a close association between DISH, obesity, diabetes mellitus (DM), and metabolic syndrome (MS) has emerged. However, a causal relationship has not yet been established. It has been suggested that the longer life expectancy and the growing incidence of MS in Western populations, associated with the tendency of DISH to manifest in later life, may increase the DISH prevalence rates in the following decades. Future investigations should focus on the early DISH phase to clarify pathogenetic mechanisms and identify targeted therapies.

Diffuse idiopathic skeletal hyperostosis (DISH) and axial spondyloarthritis (axSpA) are diseases with inflammatory involvement of the axial skeleton that can result in new bone formation that may lead to total ankylosis of the spine and functional impairment of different extent in individual patients. In these diseases, the new bone formation may lead to total ankylosis of the spine and impaired mobility with functional impairment. This review will highlight the similarities and differences of these two conditions. In axSpA, the genetic background with the association with human leukocyte antigen-B27 (HLA-B27) is known for 50 years, while in DISH, a genetic contribution is not yet proven. The phenotype of new bone formation and its anatomic features are different between these diseases. In axSpA symmetric, thin and marginal syndesmophytes representing an ossification of enthesitic inflammation at the area of the attachment of the annulus fibrosus that may extend to the adjacent deeper layers anterior longitudinal ligament and are typical, while in DISH the so-called “chunky bridging osteophytes” grow as an additional layer on the anterior longitudinal ligament. Besides distinct anamnestic and clinical features, magnetic resonance imaging is helpful differentiating the two diseases since inflammatory changes with the typical pattern of axSpA are reliably visualized. Similar in both diseases is the high prevalence of vertebral fractures, which are mainly caused by the local osteoporosis and decreased flexibility of the affected bones, and therefore may occur even after minor traumata. The presence of extraarticular manifestations like uveitis, inflammatory bowel disease or psoriasis are only linked to axSpA. In contrast, DISH is associated with obesity, diabetes mellitus, and other metabolic diseases. Although DISH and axSpA are distinct conditions, the cooccurrence of these two diseases exists in some patients. Various therapeutic options are becoming available for axSpA, but no therapy has been approved for DISH yet.

Bone formation is a complex process that occurs throughout life, and is normally limited to the skeletal system. In bone formation, osteoprogenitor cells follow several developmental stages, including differentiation in osteoblasts, proliferation, matrix maturation, and mineralization. The mechanisms involved in the mineralization process of bone, such as in the new bone formation, are extremely complex and have been under intense investigation for many years. Bone formation follows two distinct processes, intramembranous and endochondral ossification; both are regulated by signaling pathways involving numerous genes. Disturbance of these signaling pathways may cause a large spectrum of skeletal diseases characterized by new bone formation and bone growth anomalies. This review will only focus on the key genetic pathways involved in heterotopic bone formation. Wingless/integrated (Wnt), hedgehog (HH), and transforming growth factor beta (TGFβ)/bone morphogenetic protein (BMP) signaling pathways are described and illustrated; their relation with new bone formation is demonstrated through their involvement in bone formation disorders.

Diffuse idiopathic skeletal hyperostosis (DISH) can lead to dysphagia, airway obstruction, and unstable vertebral fractures. Surgery can be performed to relieve cervical compression or stabilize fractures of the spinal column, with or without decompression of spinal cord injuries. In this review, the peri-operative surgical techniques in cases with DISH are discussed, as well as the pre-operative and post-operative pearls and pitfalls. It is essential for spine surgeons, including orthopedic surgeons and neurosurgeons, to be aware of the considerations, anticipations, and approaches for the management of dysphagia, airway obstruction, and fractures in DISH patients in order to improve patient outcomes for this specific at-risk patient population.

Diffuse idiopathic skeletal hyperostosis (DISH) is a systemic condition characterized by the new bone formation and enthesopathies of the axial and peripheral skeleton. The diagnosis of DISH currently relies upon the end-stage radiographic criteria of Resnick and Niwayama, in which bridging osteophytes are present over at least four thoracic vertebras. The pathogenesis of DISH is not well understood, and it is currently considered a non-inflammatory condition with an underlying metabolic derangement. However, an inflammatory component was suggested due to the similarities between DISH and spondyloarthritis (SpA) in spinal and peripheral entheseal new bone formation. Magnetic resonance imaging (MRI) is the imaging modality of choice in the diagnostic work-up and follow-up of patients with SpA, as well as in understanding its pathogenesis. The aims of the current review were to evaluate the current and future role of MRI in imaging DISH.