Recurrent chondroblastoma of the acetabulum in an adult.

Chondroblastoma is a rare, benign neoplasm of chondroblast cell origin, accounting for less than 1% of primary bone tumors. It is usually diagnosed in the second decade of life with most of the cases involving the long bones such as the femur and humerus. Furthermore, over 90% of cases are in individuals under 30 years of age.

A rare case of chondroblastoma involving the distal phalanx of the ring finger.

Chondroblastoma, a rare benign bone tumor, is typically found in the epiphysis of long bones, with hand involvement being particularly uncommon. We present a case of an 11-year-old female with chondroblastoma involving the fourth distal phalanx of the hand. Imaging revealed a lytic, expansile lesion with sclerotic margins and no soft tissue component.

Unusual chondroblastoma of the hand with large extraosseous soft tissue component.

Chondroblastoma is a rare, benign primary cartilaginous bone tumor that typically arises in the epiphyses of the long bones. Radiologically, a well-defined lytic lesion with thin sclerotic margins is commonly found. The tumor is characterized histologically as an admixture of chondroblasts and multinucleated giant cells with chondroid matrix and pericellular calcifications.

The New Normal: Coronavirus Pandemic Response Utilizing Microsoft SharePoint.

On March 11, 2020, the World Health Organization (WHO) declared the novel coronavirus disease (COVID-19) a pandemic. Hospitals throughout the USA and the residency programs housed therein have drastically altered their standard operations to slow the spread of disease. Maintaining the educational mission of a residency program within the parameters of social distancing mandates is an unprecedented challenge to graduate medical education and will remain so for the near future.

Erdheim-Chester disease: an unusual presentation of an uncommon disease.

Erdheim-Chester disease (ECD) is a rare, non-Langerhans cell histiocytosis with classic radiographic findings of patchy or diffuse osteosclerosis predominantly involving the long bones in a bilaterally symmetrical pattern. A 49-year-old woman presented with diffuse lymphadenopathy, painful skin lesions, and constitutional symptoms. Recent history was significant for a nontraumatic fracture of the tibia 3 weeks prior to admission.

Venous tumor thrombus from a pelvic osteosarcoma.

We present a case of pelvic osteosarcoma in an 18-year-old woman with a tumor thrombus in the left iliac vein, extending to the inferior vena cava. Tumor thrombus has been rarely described with osteosarcoma, with only 14 cases in the literature.

Superficial acral fibromyxoma.

We present a case of a superficial acral fibromyxoma (SAFM) of the distal aspect of the thumb with radiographic evidence of extrinsic pressure erosion of the underlying cortex. This 47-year-old woman presented with a slow-growing mass over the distal aspect of the right thumb that proved to be SAFM on surgical pathology. This is a relatively rare mesenchymal neoplasm of the periungual and subungual regions of fingers and toes.

Coracoid fracture with recurrent AC joint separation after Tightrope repair of AC joint dislocation.

We present a case of failure of acromioclavicular joint (ACJ) reduction that was performed with low-profile, double-metallic button technique (Tightrope; Arthrex Inc). The patient presented with coracoid fracture and loss of reduction within eight weeks of surgery.

Bilateral triceps tendon tear.

Triceps tendon tear is one of the least commonly recognized major tendon tears. Bilateral triceps tendon tears are especially rare. We present a case of simultaneous complete tears of bilateral triceps tendons secondary to a fall.