Multifocal calcific periarthritis with distinctive clinical and radiological features in patients with CD73 deficiency.

Objectives: Arterial calcification due to deficiency of CD73 (ACDC) is a hereditary autosomal recessive ectopic mineralization syndrome caused by loss-of-function mutations in the ecto-5'-nucleotidase gene. Periarticular calcification has been reported but the clinical characterization of arthritis as well as the microstructure and chemical composition of periarticular calcifications and SF crystals has not been systematically investigated.

Methods: Eight ACDC patients underwent extensive rheumatological and radiological evaluation over a period of 11 years.

Morphology and chemical identity of periarticular and vascular calcification in a patient with the rare genetic disease of arterial calcification due to deficiency of CD73 (ACDC).

A 54-year old female patient with the genetic disease of arterial calcification due to deficiency of CD73 was studied under the Undiagnosed Disease Program of the National Institutes of Health. She presented with symptoms of claudication in her 40s and later developed arthritic symptoms, ectopic calcification in her left hand and severe arterial calcifications of the lower extremities. Since little was known about the composition of the calcifications in arterial calcification due to deficiency of CD73, we investigated their chemical identity and microscopic morphology in this patient with imaging and x-ray diffraction analysis.

Contribution of COMT and BDNF Genotype and Expression to the Risk of Transition From Acute to Chronic Low Back Pain.

Objectives: A number of factors, including heritability and the environment, contribute to risk of transition from acute low back pain to chronic low back pain (CLBP). The aim of this study was to (1) compare somatosensory function and pain ratings at low back pain (LBP) onset between the acute low back pain and CLBP conditions and (2) evaluate associations between BDNF and COMT polymorphisms and expression levels at LBP onset to acute and chronic pain burden and risk for transition to the chronic pain state.

Methods: In this longitudinal study, 220 participants were enrolled following recent onset of LBP and data were collected until the LBP resolved or until the end of the study at 6 months.

Forced Enlightenment: A Metasynthesis of Experiences During Childhood Cancer Survivorship.

Background: Childhood cancer survivorship can be described as a lifelong experience that requires vigilant follow-up care and continual support. Although there is growing qualitative and quantitative literature on this experience, articles focusing on qualitative synthesis are lacking. Qualitative metasynthesis can further facilitate the knowledge of survivorship experiences to inform care.