Telepathology consultation in China using whole slide image and an internet based platform

Telepathology is a particularly useful pathological tool suitable for developing countries such as China, which generates a large number of pathology specimens each year due to the size of its population but has a shortage of well trained and experienced pathologists in primary cares hospitals and hospitals within under-developed regions. Pathologists in these hospitals often have difficulty diagnosing challenging pathology cases. Telepathology, especially second opinion or teleconsultation is one of the solutions to this problem [ 1 – 3 ]. We reported an internet based open telepathology consultation platform using whole slide images (WSI) in China. The results from the telepathology consultation service since inception have been analyzed and summarized for this publication. We believe that our experiences will help to promote telepathology in China and in other developing countries. The telepathology consultation cases used in this report represent pathology consultation sent to the telepathology consultation platform ( http://www.mpathology.cn/mpcc/ ) from the beginning of the service in July 2008 to May 30, 2011. The cases submitted for teleconsultation were from 29 institutions, which were equipped with a virtual microscope, Motic Virtual Microscopic Scanner (Motic, China). The equipment and related software used in this report were validated in a previous telepathology study using a variety of 600 surgical pathology specimens [ 4 ]. When the participating hospital had a pathology case requiring consultation, a referring pathologist logged into the website, http://www.mpathology.cn/mpcc/ with a secure user name and password and filled out an online request form which included the patient’s name, age, and relevant clinical information, gross findings, immunohistochemistry results, a preliminary diagnosis and the name of expert pathologist chosen for consultation. Referring pathologist then scanned, uploaded and attached WSI of one or several representative H/E slides as well as relevant immunohistochemistry stained slides to the request form, and then sent these to the platform. An internet based telepathology platform was used and a server was used for storage of images and data. The system was maintained by two information technology (IT) technicians and one system manager. When referring pathologists from submitting hospital sent request for consults to the platform, IT technicians would be alerted by e-mails. The technician would then exam the completeness of submitted materials and system manager would contact the expert pathologist for consultation. A panel of 84 Chinese pathology experts was invited and agreed to participate in the teleconsultation service. The names, affiliation of the pathologists and the areas of their subspecialty expertise were listed on the website ( http://www.mpathology.cn/mpcc/ ). The platform covered the medical malpractice insurance for the expert consultants. When an expert pathologist was requested for consultation, the expert was instantly noticed by the cell phone message and e-mail. The expert pathologist would use a computer or an Ipad to log into the website, review WSI, capture a representative image, write the pathologic diagnosis, sign the report with an electronic signature and then release the final report. Once the final report was released, the system sent an email to alert the system manager who then sent the final consultation report by e-mail or fax to the referring pathologist. Statistical analysis was performed using SPSS 7.0 edition. The number of cases submitted increased from 17 cases in 2008 to 587 cases in 2010. 935/1022 cases (91%) were sent in 2010 and the first 5 months of 2011. A total of 29 hospitals were participated in the telepathology consultation service. The number of participating hospitals was 3 in 2008, 9 in 2009, and 21 in 2010; a 7-folds increase from 2008 to 2010. The mean number of cases submitted by each hospital was 35 cases in the past 3 years. Ten hospitals accounted for 90% of the cases submitted, with the other 19 hospitals accounting for only 10% of the submitted cases. The average number of WSI per case was 1.8 with a range from 1 to 11. 62.0% of the cases only had one WSI, 27.6% had two WSI, and 10.4% had 3 or more WSI. 203 (19.8%) of the cases had included immunohistochemistry slides. The average time needed from transmitting teleconsultation request form with attached WSI image to the server to the release of teleconsultation pathology report by expert consultants was 38 hours with a range of less than 1 hour to 323 hours. The teleconsultation report was released within 12 hours for 43.2% of cases; 24 hours for 65.9% of cases and 48 hours for 79% of cases (Table 1 ). Although a list of 84 expert consultants was available for teleconsultation, only 43 expert consultants were requested by submitting hospitals for teleconsultation. Among these 43 experts, 23 consultants were requested most frequently, accounting for 95% of the consultation cases. The common sites of the pathology were gynecologic (24.2%), gastrointestinal/ liver/pancreatic (14.7%), and lung (13.1%), each accounting for more than 10% of cases. 810 (79.3%) out of 1022 were neoplastic pathology. Among them, 193 (21.3%) were benign tumors but 637 (78.7%) were malignant. 302 (29.5%) out of 1022 cases were not given a preliminary pathology diagnosis by submitting hospitals. Among 720 cases with a preliminary pathology diagnosis, 122 (16.9%) of the cases received a consultation report which was not in agreement with the preliminary pathology diagnosis (Table 2 ). Local hospital pathologists could not render a preliminary diagnosis or made a wrong preliminary diagnosis in 424 cases, representing 41.5% of the total teleconsultation cases.

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