Benign parosteal osteochondromatous proliferation of the hand originally diagnosed as osteochondroma: a report of two cases and review.

Bizarre parosteal osteochondromatous proliferation (BPOP) is a rare cartilaginous neoplasm that often presents in the long bones of the hands and feet. BPOP is a benign but locally aggressive fibro-osseous mass that has striking clinical, radiographic, and histologic similarities with osteochondroma. Differentiating between the two lesions is important as BPOP often requires more extensive surgical resection and has a higher recurrence rate compared to osteochondroma. This report presents two cases of BPOP where initial clinical diagnosis of osteochondroma was made even after appropriate imaging and histologic samples were evaluated. This report reviews clinical, radiographic, and histologic characteristics that can differentiate between the two lesions.

Hip fracture outcome: is there a "July effect"?

We assessed the differential complications and mortality rates of teaching versus nonteaching hospitals in July against other month-to-month differences in a cohort of 324,988 elderly patients hospitalized for a femoral neck or intertrochanteric fracture (data taken from the 1998-2003 National Inpatient Sample). Demographics were similar between teaching and nonteaching hospitals and across admission months. The overall mortality rate was 3.64% and was slightly higher in teaching hospitals compared with nonteaching hospitals (3.69% vs. 3.61%, relative risk [RR] = 1.0062, 95% CI 0.99-1.02). The adjusted relative risk (RR) for mortality in July/August was significantly higher than the overall adjusted RR and compared with all other month pairs, indicating higher in-hospital mortality rates in teaching hospitals compared with nonteaching hospitals. Intraoperative complications and length of stay were statistically significantly greater in teaching hospitals but did not demonstrate a "July effect." Teaching hospitals had lower perioperative complication rates. Elderly hip fracture patients treated at teaching hospitals had 12% greater relative risk of mortality in July/August (ie, experience a "July effect") compared with nonteaching hospitals during that time period (1998-2003). Although various methods exist for exploring the "July effect," it is critical to take into account inherent month-to-month variation in outcomes and to use nonteaching hospitals as a control group.

Does skeletal maturity predict sequential contralateral involvement after fixation of slipped capital femoral epiphysis?

BACKGROUND: The management of the uninvolved hip after fixation of unilateral slipped capital femoral epiphysis (SCFE) remains controversial. The purpose of this study was to determine the relationship of sequential contralateral slip to the initial patient presentation, specifically skeletal maturity. METHODS: The medical records and radiographs for all patients who underwent fixation of unilateral SCFE between June 1996 and October 2003 were reviewed retrospectively. Data were gathered on age, sex, stability, chronicity, body mass index, modified Oxford bone age (mOBA), physeal slope angle, grade, and contralateral involvement as determined by need for fixation. RESULTS: Seventy-one children underwent fixation of unilateral SCFE. At initial presentation, the triradiate cartilage was open in 43 patients and closed in 28 patients. There was no difference in the rate of contralateral involvement based on any measured parameter. Although not statistically significant, closure of the triradiate cartilage and increased mOBA were associated with lower rates of sequential slip progression. Only 1 patient with a mOBA greater than 22 had contralateral progression. The rate of contralateral slip was 23% when the triradiate cartilage was open. When the triradiate cartilage was closed, 93% demonstrated no sequential contralateral slip. CONCLUSIONS: In this series, 23% of patients with open triradiate cartilage went on to contralateral slip, but all sequential slips were classified as mild. No studied variable proved to be a statistically significant predictor in this group of patients, including skeletal maturity. Further study to identify useful predictive factors would be beneficial to these patients, but our results question the need for prophylactic pinning in this population. LEVEL OF EVIDENCE: Level IV.