Utility of Pre-Hematopoietic Cell Transplantation Sinus CT Screening in Children and Adolescents

An algorithmic approach to sinonasal evaluation preceding bone marrow transplantation

<b>Introduction:</b> The authors conducted this study to review the available resources and prepare an algorithmic approach to pre-transplantation sinonasal evaluation.</br></br> <b>Materials and methods:</b> The sources of data were PubMed, Cochrane databases, and Google Scholar. We searched the available database for English-language studies using the keywords rhinosinusitis, transplantation, post -transplant sinusitis. Studies of all designs were included.</br></br> <b>Results:</b> Thirty-five relevant studies were retrieved from a total of 182 articles. The review of references guided us to 5more publications.</br></br> <b>Discussion:</b> We have proposed an algorithmic approach to sinonasal evaluation before transplantation which can provide a brief but comprehensive assessment of the patients. The evaluation begins with a thorough history and physical examination, including nasal endoscopy with careful attention to objective evidence of inflammation. CT scan should not be considered in all of the cases.</br></br> <b>Conclusion:</b> We have suggested an algorithm to provide a comprehensive and cost-effective way for the evaluation of sinonasal diseases before planned immunosuppression in order to assist in reducing post-transplantation morbidity and mortality.

Imaging of pediatric hematopoietic stem cell transplant recipients: A COG Diagnostic Imaging Committee/SPR Oncology Committee White Paper

Imaging in hematopoietic stem cell transplantation patients is not targeted at evaluating the transplant per se. Rather, imaging is largely confined to evaluating peri-procedural and post-procedural complications. Alternatively, imaging may be performed to establish a baseline study for comparison should the patient develop certain post-procedural complications. This article looks to describe the various imaging modalities available with recommendations for which imaging study should be performed in specific complications. We also provide select imaging protocols for different indications and modalities for the purpose of establishing a set minimal standard for imaging in these complex patients.

The use of imaging to identify immunocompromised children requiring biopsy for invasive fungal rhinosinusitis

BACKGROUND AND PURPOSE

Children with severe immunocompromise due to cancer therapy or hematopoietic cell transplant are at risk both for potentially lethal invasive fungal rhinosinusitis (IFRS), and for complications associated with gold-standard biopsy diagnosis. We investigated whether early imaging could reliably identify or exclude IFRS in this population, thereby reducing unnecessary biopsy.

METHODS

We reviewed clinical/laboratory data and cross-sectional imaging from 31 pediatric patients evaluated for suspicion of IFRS, 19 without (age 11.8 ± 5.4 years) and 12 with proven IFRS (age 11.9 ± 4.6 years). Imaging examinations were graded for mucosal thickening (Lund score), for fungal-specific signs (FSS) of bone destruction, extra-sinus inflammation, and nasal mucosal ulceration. Loss of contrast enhancement (LoCE) was assessed separately where possible. Clinical and imaging findings were compared with parametric or nonparametric tests as appropriate. Diagnostic accuracy was assessed by receiver operating characteristic (ROC) analysis. Positive (+LR) and negative likelihood ratios (-LR) and probabilities were calculated.

RESULTS

Ten of 12 patients with IFRS and one of 19 without IFRS had at least one FSS on early imaging (83% sensitive, 95% specific, +LR = 15.83, -LR = 0.18; P < .001). Absolute neutrophil count (ANC) ≤ 200/mm³ was 100% sensitive and 58% specific for IFRS (+LR = 2.38, -LR = 0; P = .001). Facial pain was the only discriminating symptom of IFRS (P < .001). In a symptomatic child with ANC ≤ 200/m³ , the presence of at least one FSS indicated high (79%) probability of IFRS; absence of FSS suggested low (<4%) probability.

CONCLUSION

In symptomatic, severely immunocompromised children, the presence or absence of fungal-specific imaging findings may effectively rule in or rule out early IFRS, potentially sparing some patients the risks associated with biopsy.