Three species of the genus Sectonema, namely S. demani, S. heynsi and S. macrospiculum, originally described by E. Altherr, are re-described on the basis of type material. Detailed descriptions, morphometrics and illustrations, including line drawings and/or LM pictures, diagnoses and remarks about their identity and later reports are provided for each species. Sectonema demani is characterized...

he principles regarding impingement in the natural osseous (anatomic) hip put forth by Ganz et al. are similar in concept to what can occur in the prosthetic hip. To understand impingement, it is helpful to recognize the common mechanisms that cause mechanical abutment in both anatomic and prosthetic hips. In the anatomic hip joint, impingement is a mechanical abutment conflict between the bone...

giant cell tumors of the neck occur very rarely. Although such tumors usually arise from cartilaginous neck structures, they sometimes originate in the soft tissues. Soft-tissue giant cell tumors of the neck are likely to be more aggressive and have a higher mortality rate than are tumors arising from the cartilaginous larynx. An aggressive use of available treatment modalities, including radio...

Dislocation remains a common cause of failure after total hip arthroplasty. The limitations of existing approaches to address instability have led to the development of powerfull options: constrained liners, dual mobility and large heads. These implant-related options have proven to be very efficient, but have raised concerns.With constrained liners, restricted range of motion (ROM) is responsi...

are well documented but uncommon.[2,4] The lesions of SCAP measure between 1 and 3 cm in diameter[3] and all published cases of nodular SCAP have to date measured <4 cm in diameter.[4] A vast majority of SCAPs are solitary lesions, and linear arrangement of these lesions is particularly rare.[5] In 2001, Patterson et al., described that there had been only eight previous cases of linear SCAP. F...

Operative treatment of displaced and comminuted radial head fractures involves internal fixation with plates and screws in cases where reconstruction is possible and replacement with a radial head prosthesis when comminution renders the radial head unreconstructable. The purposes of this study were to evaluate the morphometry of the radial head using a modern technique and to compare the findin...

Lymphaticovenous anastomosis (LVA) is a treatment for lymphoedema that can improve lymph circulation by the anastomosis of lymph vessels and veins. A therapeutic effect of LVA for lymphoedema has been shown in limbs, but efficacy for other regions has not been shown. Lymphoedema in the head-and-neck region following cancer resection and radiotherapy is mainly treated with manual lymphatic drain...

Dendritic spines are micron-sized protrusions that harbor the majority of excitatory synapses in the central nervous system. The head of the spine is connected to the dendritic shaft by a 50-400 nm thin membrane tube, called the spine neck, which has been hypothesized to confine biochemical and electric signals within the spine compartment. Such compartmentalization could minimize interspinal c...

For most of the large arterial vessels, surgeons can rely on a constant anatomy. In head and neck surgery, the common carotid arteries are important landmarks, defining the plane of the dissection during radical neck surgery (Ord & Ward-Booth, 1986). Conventional angiography is considered the most accurate technique for diagnosis of carotid bifurcation diseases, such as stenosis (Schwartz et al...