Lateral Temporal Approach for Image-Guided Stereotactic Biopsy of Pineal Region Tumors.

BACKGROUND: Biopsy of pineal region neoplasms is frequently accomplished by way of endoscopic transventricular access or using an image-guided, computer-assisted stereotactic approach. METHODS: We evaluated a nonorthogonal lateral temporal approach for stereotactic biopsy of pineal region tumors as a variation of previously described stereotactic methods. Magnetic resonance imaging-guided frameless stereotaxy was used to plan and perform biopsies of pineal region tumors using a nonorthogonal trajectory extending from the superior or middle temporal gyri through the temporal stem, anterior to the atrium of the lateral ventricle, and posterior to the corticospinal tract. RESULTS: All patients had an uncomplicated postoperative course and remained at neurologic baseline. No parenchymal or ventricular hemorrhage was present on postoperative scans. A tissue diagnosis was obtained in all patients. CONCLUSIONS: This method appears to be a safe alternative to stereotactic biopsy using other trajectories and provides adequate tissue for definitive diagnosis.

Management of Expander- and Implant-Associated Infections in Breast Reconstruction.

BACKGROUND: Periprosthetic infection remains the most common complication after implant-based breast reconstruction. Objectives of the study were to (1) describe our clinical approach and treatment protocol for managing patients with suspected periprosthetic infection, (2) identify the microorganisms causing periprosthetic infections at our institute, and (3) report on outcomes of implant salvage versus explantation. METHODS: A retrospective chart review of patients who were treated with parenteral antibiotics for periprosthetic infection was carried out. Patient characteristics, clinical and laboratory findings, outcomes, treatment modalities and complications were extracted from electronic medical records. Data were compared between patients whose implants were salvaged versus explanted. RESULTS: Fifty-nine patients with 67 tissue expander (TE)/implants underwent parenteral antibiotic treatment for suspected infection. Thirty-three (49%) of the TE/implants were salvaged. Mean follow-up was 14.3 months. The most commonly cultured organisms were P. aeruginosa followed by S. epidermidis. All suspected infections were treated with broad spectrum parenteral antibiotics with MRSA coverage. The most common combination was daptomycin 6 mg/kg combined with Zosyn 4.5 g. Explantations were significantly more common in patients with history of chemotherapy (p = 0.03), hypertension (p = 0.04) and those who underwent therapeutic mastectomy (p = 0.04). CONCLUSION: Risk factors for explantation due to postoperative periprosthetic infections following TE/implant-based breast reconstruction include chemotherapy, hypertension and therapeutic mastectomy. Prompt diagnosis and effective treatment of periprosthetic infection, particularly in these high-risk patients, are imperative to salvage the breast reconstruction. Gram-negative bacteria are increasingly found in breast implant infections and should be covered when employing empiric antibiotherapy. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .