China
Africa
Explore chapters and articles related to this topic
Musculoskeletal system
Published in A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha, Clark’s Procedures in Diagnostic Imaging: A System-Based Approach, 2020
A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha
Proton density, T1-SE and T2-TSE sequences demonstrate the anatomy of the foot providing excellent soft tissue contrast. Fatty tissue within bone marrow and in the fascial planes is high signal intensity on these sequences. The tendons and ligaments are low signal intensity on all sequences, abnormalities within the ligament or tendon increase the signal intensity and are demonstrated as brighter areas within the dark anatomical structure. Bone marrow is low signal on STIR- or T2-weighted fat suppressed images, which best demonstrates high signal bone oedema associated with injury such as a stress fracture of the metatarsal or conditions such as osteomyelitis. MRI is commonly performed to demonstrate Morton’s neuroma, which is a fibrous soft tissue lesion of the common digital nerve occurring between the metatarsals. It is intermediate signal intensity on T1- and T2-weighted images, with contrast enhancement demonstrated in around half of these lesions.
Foot and ankle
Published in Professor Sir Norman Williams, Professor P. Ronan O’Connell, Professor Andrew W. McCaskie, Bailey & Love's Short Practice of Surgery, 2018
Professor Sir Norman Williams, Professor P. Ronan O’Connell, Professor Andrew W. McCaskie
Metatarsalgia usually occurs secondary to joint problems, overload or irritation of a nerve. Morton’s neuroma is a painful condition which in most cases arises from compression of the common digital nerve between the third and fourth metatarsal heads and is usually secondary to other forefoot pathology.
Test Paper 5
Published in Teck Yew Chin, Susan Cheng Shelmerdine, Akash Ganguly, Chinedum Anosike, Get Through, 2017
Teck Yew Chin, Susan Cheng Shelmerdine, Akash Ganguly, Chinedum Anosike
Morton neuromas are masses composed of interdigital perineural fibrosis and nerve degeneration. Morton neuroma occurs between the metatarsal heads, most commonly between the third and fourth toes. Morton neuroma is more common in women, and high-heeled shoes have been implicated as a causative factor. Pain at the metatarsal head, often radiating to the toes, is characteristic.
Ultrasound as a diagnostic and interventional aid at point-of-care in dermatology clinic: a case report
Published in Journal of Dermatological Treatment, 2020
Yasmin Hadian, Daniel Link, Sara E. Dahle, R. Rivkah Isseroff
While magnetic resonance imaging (MRI) can be used for diagnosing subcutaneous masses, this can impose a financial and time burden on patients (14,15). Alternatively, ultrasound provides a more affordable, accessible, and timely method of imaging skin lesions with the additional benefit of guiding diagnosis and treatment in a single point-of-care visit (7,15). For example, when guiding injections, ultrasound allows visualization of placement of the agent, minimizing complications and increasing efficacy of treatment. Indeed, therapeutic injections under ultrasound-guidance have been previously shown to improve outcomes for Morton’s neuroma when compared to injections performed without ultrasound-guidance (7). Another recent study demonstrated that 90% of patients with lower extremity ganglion cysts experienced resolution of symptoms immediately after ultrasound-guided intralesional injection, and 77% of these patients did not experience recurrence upon follow up within 20 months. Importantly, there were no immediate or delayed procedural complications such as nerve trauma, hematoma, or infection (13).
A case of splaying toes caused by Morton’s neuroma indicates early rheumatoid arthritis
Published in Modern Rheumatology Case Reports, 2018
Koji Mandai, Masahiro Tada, Yutaro Yamada, Masanari Aono, Noriaki Hidaka
Morton’s neuroma is an entrapment neuropathy of the plantar digital nerve in the intermetatarsal space accompanied by a burning sensation in the toes and pain in the intermetatarsal space. The third intermetatarsal space is typically involved in 75% of the cases and the second intermetatarsal space in 20% [1]. It has been reported that the causes of Morton’s neuroma include: mechanical stress from the deep transverse metatarsal ligament and soft tissues; swelling and fibrosis caused by trauma; hypertrophic bursae, synovitis, and nodules of rheumatoid arthritis (RA); and compression from a tumour [2]. Initial sites of RA include not only the proximal interphalangeal (PIP) joints, metacarpophalangeal (MCP) joints, and wrists, but also the metatarsophalangeal (MTP) joints. It is important to check for swelling and tenderness of the MTP joints and toe PIP joints, because approximately 20% of patients with RA present initially with foot and ankle symptoms, and most patients will eventually develop foot and ankle symptoms [3].