bims-netuvo 2022-06-19 papers

Front Pain Res (Lausanne). 2022 ;3 887747

Neuronal Sprouting and Reorganization in Bone Tissue Infiltrated by Human Breast Cancer Cells.

Rie B Hansen, Manasi Sayilekshmy, Michala S Sørensen, Astrid H Jørgensen, Ida B Kanneworff, Emma K E Bengtsson, Tomas A Grum-Schwensen, Michael M Petersen, Charlotte Ejersted, Thomas L Andersen, Christina M Andreasen, Anne-Marie Heegaard.

Background: Pain is a common complication for patients with metastatic bone disease. Animal models suggest that the pain, in part, is driven by pathological sprouting and reorganization of the nerve fibers innervating the bone. Here, we investigate how these findings translate to humans.
Methods: Bone biopsies were collected from healthy volunteers (n = 7) and patients with breast cancer and metastatic bone disease (permissions H-15000679, S-20180057 and S-20110112). Cancer-infiltrated biopsies were from patients without recent anticancer treatment (n = 10), patients with recent anticancer treatment (n = 10), and patients with joint replacement surgery (n = 9). Adjacent bone sections were stained for (1) protein gene product 9.5 and CD34, and (2) cytokeratin 7 and 19. Histomorphometry was used to estimate the area of bone marrow and tumor burden. Nerve profiles were counted, and the nerve profile density calculated. The location of each nerve profile within 25 μm of a vascular structure and/or cancer cells was determined.
Results: Cancer-infiltrated bone tissue demonstrated a significantly higher nerve profile density compared to healthy bone tissue. The percentage of nerve profiles found close to vascular structures was significantly lower in cancer-infiltrated bone tissue. No difference was found in the percentage of nerve profiles located close to cancer between the subgroups of cancer-infiltrated bone tissue. Interestingly, no correlation was found between nerve profile density and tumor burden.
Conclusions: Together, the increased nerve profile density and the decreased association of nerve profiles to vasculature strongly suggests that neuronal sprouting and reorganization occurs in human cancer-infiltrated bone tissue.

Keywords: bone; breast cancer; cancer-induced bone pain; innervation; metastatic bone disease; neuronal sprouting

DOI: https://doi.org/10.3389/fpain.2022.887747

Zhonghua Yi Xue Za Zhi. 2022 Jun 21. 102(23): 1741-1746

[Spectral CT multi-parameter imaging in preoperatively evaluation the status of lymphovascular and perineural invasion of gastric cancer].

T Z Ren, L N Deng, S L Li, J C Sun, S W Liu, J L Zhou.

Objective: To explore the application value of spectral CT multi-parameter imaging in preoperative assessment the status of lymphovascular invasion (LVI) and perineural invasion (PNI) in patients with gastric cancer. Methods: A total of 62 patients who underwent energy spectral CT and with pathology confirmed gastric cancer in Lanzhou Uiversity Second Hospital from September 2020 to September 2021 were retrospectively collected, which including 46 males and 16 females, aged from 36 to 71 (57.5±9.1) years. According to the presence or absence of LVI/PNI in postoperative pathological results, they were divided into the positive group (42 cases) and the negative group (20 cases). The CT values of 40 keV and 70 keV (CT40 keV, CT70 keV), iodine concentration (IC), normalized iodine concentration (NIC) were measured in the arterial phase, the venous phase, and the delay phase, and the spectral curve slope of 40 keV to 70 keV (K(40-70)) and the combined parameters (the arterial phase: AP~all, the venous phase: VP~all, the delay phase: DP~all) were calculated. Spectral parameters between the positive and negative groups were compared, and the receiver operating characteristic curve (ROC) with the area under the curve (AUC), sensitivity, specificity, and optimal threshold were calculated for evaluating the diagnostic performance of each parameter. Results: The CT40 keV, CT70 keV, K(40-70), IC, and NIC in the arterial phase and the venous phase and the CT70 keV and NIC in the delay phase of the LVI/PNI-positive group were all higher than those of the negative group [the representative parameters: the arterial phase NIC 0.14±0.04 vs 0.12±0.04, the venous phase NIC 0.5(0.5, 0.6) vs 0.4(0.4, 0.5), the delay phase NIC 0.6±0.1 vs 0.5±0.1, all P<0.05]. ROC curve analysis showed that the diagnostic efficacy of the parameters of the venous phase is better than that of the arterial phase and the delay phase, and the diagnostic efficiency of the combined parameters is better than that of the individual parameters. The AUC value, sensitivity, and specificity of the most optimal parameter VP~all of the venous phase were 0.931(95%CI:0.872-0.990), 80.95%, and 95.00%, respectively. Conclusions: In the preoperative evaluation the status of the LVI and PNI in gastric cancer, the diagnostic efficacy in the venous phase parameters is better than that in the arterial phase and delay phase, and the diagnostic efficacy of combined parameters is better than that of individual parameters.

DOI: https://doi.org/10.3760/cma.j.cn112137-20211201-02682

Skeletal Radiol. 2022 Jun 17.

Ultrasound and MR imaging of peripheral nerve tumors: the state of the art.

Guillaume Lefebvre, Thomas Le Corroller.

Peripheral nerve sheath tumors are a heterogeneous subgroup of soft tissue tumors that either arise from a peripheral nerve or show nerve sheath differentiation. On imaging, direct continuity with a neural structure or location along a typical nerve distribution represents the most important signs to suggest the diagnosis. Ultrasound and magnetic resonance imaging are the best modalities to evaluate these lesions. First, it is necessary to differentiate between a true tumor and a non-neoplastic nerve condition such as a neuroma, peripheral nerve ganglion, intraneural venous malformation, lipomatosis of nerve, or nerve focal hypertrophy. Then, with a combination of clinical features, conventional and advanced imaging appearances, it is usually possible to characterize neurogenic tumors confidently. This article reviews the features of benign and malignant peripheral nerve sheath tumors, including the rare and recently described tumor types. Furthermore, other malignant neoplasms of peripheral nerves as well as non-neoplastic conditions than can mimick neurogenic tumor are herein discussed.

Keywords: MR imaging; Nerve; Peripheral nerve sheath tumor; Ultrasound

DOI: https://doi.org/10.1007/s00256-022-04087-5

J Maxillofac Oral Surg. 2022 Jun;21(2): 350-357

The Interrelation Among Triad of Depth of Invasion, Perineural Invasion and Tumor Size in Squamous Cell Carcinoma of Tongue and Floor of the Mouth: An Analytical Appraisal.

G V S Sudhakar, Ashok Das, Kunal Ranjan, A C Kataki.

Background: Head and neck cancer represents 5-10% of all malignancies. Squamous cell carcinoma (SCC) of the oral cavity represents about 2% of overall malignant neoplasms and 47% of the head and neck region. Squamous cell carcinoma of tongue has a peculiar behavior of occult and skips metastasis to regional lymph nodes. It occasionally occurs along with floor of the mouth. The purpose of this study is to evaluate the significance of correlation between, depth of invasion of the primary tumor, its proximity with the neurovascular bundle and subsequent perineural invasion and cervical lymph node metastasis in squamous cell carcinoma tongue and floor of the mouth and the sites involving both.
Materials and Methods: A total of 108 patients with carcinoma tongue (59), floor of the mouth (20) and involving both together (29) who underwent treatment during January 2015 to June 2017 that were followed up until December 2019 were assessed. Out of 108 patients that were included in the study, 71 patients underwent primary surgery and 37 patients were inoperable (tongue-17, floor of the mouth-9 and involving both together-11).
Results: Perineural invasion was seen in 15 cases of pT1-2 where depth of invasion was less than 1 cm and in 28 cases of pT3-4 where depth of invasion was more than 1cm (p-0.075). Skip metastasis was accounted for 61.9% overall.
Conclusion: The triad of perineural invasion, depth of invasion and tumor size is interrelated and was responsible for cervical lymph node metastasis and prognosis of the disease. Obtaining clear deep margins of the tumor from the mucosal margin and removal of lympho-fatty tissue at the floor of the mouth is an important aspect which gives the indication about prognostic factors like depth of invasion, tumor size, cervical nodal metastasis and recurrence of the disease. High-grade tumors (T3-4), depth of invasion of tumor at 1 cm or > 1 cm, increase the propensity of perineural invasion highly.

Keywords: Cervical nodal metastasis; Depth of invasion (DOI); Floor of the mouth (FOM); Perineural invasion (PNI); Squamous cell carcinoma of tongue (SCC)

DOI: https://doi.org/10.1007/s12663-022-01685-7