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xxiv
LuisGustavoCapochinRomagnolo, MD IRCAD Latin America, Barretos, Brazil
Department of Surgery, Barretos Cancer Hospital, Barretos, Brazil
Marcos Gómez Ruiz, MD, PhD, FEBS, Coloproctology Hospital Universitario Marqués de Valdecilla, IDIVAL, Servicio de Cirugía General y Aparato Digestivo, Unidad de Cirugía Colorrectal, Santander, Spain
EricRullier, MD Department of Colorectal Surgery, Haut-Levèque, Pessac, France
Muhammad Shaque Sajid, MBBS, MSc, MBA, FCPS, FRCS (GEN) Department of Digestive Disease, The Royal Sussex County Hospital,
Brighton and Sussex University Hospitals NHS Trust, Brighton, UK
Yoshiharu Sakai, MD, PhD, FACS Department of Surgery, Graduate School of Medicine, Kyoto University Hospital, Kyoto, Japan
Ryohei Sakamoto, MD Department of Gastroenterological Surgery, Fukuoka University Hospital, Fukuoka, Japan
JeanSalem, MD Lankenau Medical Center, Division of Colorectal Surgery, Wynnewood, PA, USA
Dana Sands, MD, FACS, FASCRS Department of Colorectal Surgery, Cleveland Clinic Florida, Weston, FL, USA
Contributors
GuilhermePaginSãoJulião, MD Angelita & Joaquim Gama Institute, Sao Paulo, Brazil
Rishabh Sehgal, MB, MD University Hospital Limerick, Department of Surgery, Limerick, Ireland
C.Sietses, MD, PhD Gelderse Vallei Hospital, Department of Surgery, Ede, Gelderland, The Netherlands
ThushySiva, MBBS Easton Hospital, Department of Surgery, Easton, PA, USA
António S. Soares Division of Surgery and Interventional Sciences, University College London Hospitals, NHS Trusts, GENIE Centre, University College London, London, UK
Antonino Spinelli, MD, PhD, FASCRS Division of Colon and Rectal Surgery, Humanitas Clinical and Research Center, Milan, Italy
Department of Biomedical Sciences, Humanitas University, Milan, Italy
ScottR.Steele, MD Department of Colorectal Surgery, Digestive Disease and Surgery Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
Andrew R. L. Stevenson, MBBS, FRACS, FASCRS University of Queensland, Brisbane, QLD, Australia
Colorectal Surgery, Royal Brisbane Hospital, Herston, QLD, Australia
Contributors
xxv
PatriciaSylla, MD, FACS, FASCRS Division of Colon and Rectal Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
Jean-SébastienTrépanier, MD Maisonneuve-Rosemont Hospital, General Surgery Department, Montréal, Québec, Canada
TrucVuTrung, MD Hanoi Medical University, Hanoi, Vietnam
St Paul Hospital, Digestive Colorectal Department of Minimally Invasive Surgery, Hanoi, Vietnam
Jurriaan Benjamin Tuynman, MD, PhD Department of Surgery, Amsterdam University Medical Center, location VUmc, Cancer Center Amsterdam, Amsterdam, The Netherlands
BrunaBorbaVailati, MD Angelita & Joaquim Gama Institute, Sao Paulo, Brazil
Stefan Erik Van Oostendorp, MD Department of Surgery, Amsterdam University Medical Center, location VUmc, Cancer Center Amsterdam, Amsterdam, The Netherlands
ItzelVela, MD Instituto Nacional de Cancerología, Mexico City, Mexico
ElenaA.T.Vikis, MD, Med, FRCSC Royal Columbian and Eagle Ridge
Hospitals, Department of Surgery, New Westminster, BC, Canada
StevenD.Wexner, MD, PhD(Hon) Digestive Disease Center, Weston, FL, USA
Department of Colorectal Surgery, Cleveland Clinic Florida, Weston, FL, USA
Arthur Randolph Wijsmuller, MD, PhD Department of Surgery, University Medical Center Groningen, Groningen, The Netherlands
AlbertM.Wolthuis, MD University Hospitals, Abdominal Surgery, Leuven, Belgium
Nathalie Wong-Chong, MD Department of Surgery, McGill University Health Centre, Montreal, QC, Canada
RaymondYap, MBBS, BMedSCi, MSurgEd Florida Hospital, Center for Colon and Rectal Surgery, Orlando, FL, USA
ShlomoYellinek, MD Department of Colorectal Surgery, Cleveland Clinic Florida, Weston, FL, USA
Yoichiro Yoshida, MD, PhD Department of Gastroenterological Surgery, Fukuoka University Hospital, Fukuoka, Japan
KarenN.Zaghiyan, MD, FACS, FASCRS Cedars-Sinai Medical Center, Division of Colon & Rectal Surgery, Los Angeles, CA, USA
Part I
Transanal Minimally Invasive Surgery
(TAMIS)

Historical Perspectives and Rationale for Development

Sergio W. Larach and Beatriz Martín-Pérez
1

Introduction

Rectal lesions, whether of benign or malignant histology, present a special challenge for surgeons because of the difculty of access and exposureto the rectal lumen. Traditional transanal methods, such as Parks transanal excision (TAE), have been associated with a high incidence of local recur­rence,thus unleashing the development of newer approaches. Heralding the era of the expansion of endoscopic surgery, transanal endoscopic micro­surgery (TEM) represented a milestone in the approach to rectal lesionexcision, as it achieved minimally invasive access to the upper rectum, a better quality of excision with improved likeli­hood of achieving negative resection margins. As a result, decreased recurrence rates and improved disease- free survival were observed, all due to improved access and the concomitant improve­ment of visual eld and dissection quality. Despite these advantages, TEM use was limited, mainlydue to a steep learning curve, complex sur­gical setup, and cost of instrumentation. It was with this pretext that transanal minimally invasive surgery (TAMIS) was born, combining TEM
S. W. Larach (*) Endosurgical Center of Florida, Orlando, FL, USA
B. Martín-Pérez Hospital Clinic, Barcelona (Spain), Gastrointestinal Surgery, Barcelona, Spain
principles with conventional laparoscopic instru­mentation, creating an important new option for appropriately trained minimally invasive colorec­tal surgeons.

From Miles Resection to Parks Excision

Surgical management of rectal lesions represents a challenge for the colorectal surgeon. Through the twentieth century, the approach to rectal cancer has largely evolved from invasive radical resections to organ-sparing techniques. Jacques Lisfranc de St. Martin (1790–1847) pioneered transanal rectal cancer excision, when in 1826 he described the removal of the anus and rectum through the perineum, resulting on a perineal colostomy [1]. In 1875, Kocher and Verneuil tried to improved rectal access and described the posterior approach includ­ing coccygectomy; this was subsequently rened by Paul Kraske (1851–1930) [2]. Abdominoperineal resection (APR) for rectal cancer was later described in 1908 by Dr. Ernest Miles, reducing local recurrence rates from 100% to 30% [3]. However, the morbidity associated with APR was high, ranging from 15% to 61% [47].
Surgeons continued to search for less-invasive options to manage rectal cancer, particu­larly within the distal one-third of the rectum. The objective would be to develop sphincter­preservation techniques that could spare patients
© Springer Nature Switzerland AG 2019 S. Atallah (ed.), Transanal Minimally Invasive Surgery (TAMIS) and Transanal Total Mesorectal Excision (taTME), https://doi.org/10.1007/978-3-030-11572-2_1
3
4
fromthe high morbidity of APR while maintain­ing acceptable oncologic outcomes. In the case of premalignant lesions including carcinoma in situ, the benets of local operations for tumor removal present a signicant advantage, as such less­invasive surgery by this modality avoids the mor­bidity of radical surgery with virtually no oncologic compromise.
In the early twentieth century, screening and endoscopic techniques were less developed than at present, for which these group of patients with benignneoplasia or T1 cancers were subjected to a radical surgery, permanent colostomy, and a high rate of morbidity. Despite radical surgery, patients had a high rate of local recurrence even for early-stage rectal cancer [4, 6]. In this quest for better approaches, local excision for rectal lesions was born as an organ preservation surgery for suitable lesions.
The pathway for management of early-stage rectal cancer followed the treatment model of early-stage breast cancer – which was treated with either (a) breast-conservation surgery and radiotherapy or (b)radical mastectomy alone [8]. Local excision for premalignant and early-stage rectal cancer (predominately via Parkstransanal excision, TAE) aimed to offer patient an improved quality of life, through stoma-free surgery and maintenance of normal bowel and urogenital function, while obtaining similar disease-free survival and cure rates to those observed with radical resection. This technique was performed with transanal retractors, which provide subopti­mal exposure of the rectal lumen (Fig. 1.1). Electrocautery and conventional surgical instru­ments were used for the local excision ofrectal neoplasms, and the full-thickness defects were closed with suture. Illumination of the rectal lumen and overalloperative eldexposure was limited by external eld lights (headlights onlymodestly improve visualization, and are dif­cult to direct and maintain onto targets). Due to these constraints, only low-lying rectal lesions (i.e., palpable lesions, whose upper edge does not extend beyond <7cm from the verge) were acces­sible by this approach, and complete, margin­negative excision of specimens could be quite challenging due to this limited exposure.
S. W. Larach and B. Martín-Pérez
Fig. 1.1 Parks anal retractor
Despite these limitations, early series from the 1970s were able to demonstrate that local excision for early-stage rectal cancer with favor­able histopathological features had equivalent oncologic outcomes when compared with radi­cal resection. In a landmark study by Morson etal., the data for local excision revealeda fail­ure rate (as dened by locoregional recurrence) that measured 8.4%, which was felt to be quite acceptable [9].
In the 1990s, the results of a prospective, multi-institutional study from the Cancer and Leukemia Group B (CalGB) reinforced the idea of local excision and organ preservation for select, early-stage rectal cancer [10]. Fifty-nine cases of T1 were treated with local excision alone and 51 cases of T2 undergoing adjuvant external beam radiotherapy after local excision (local excision was performed utilizing the conven­tional Parks TAE technique). The 6-year over­allsurvival of 85% and disease-freesurvival rates of 78% for this treatment seemed promising, par­ticularly when compared to the 20–30% failure rates after standard oncologic resection prior to the era of TME surgery [5, 6]. These encouraging early results were very well received by the surgi­cal community, which resulted in an overall increased rate of local excision as a modality of treatment [11]. Unfortunately, subsequent series published inferior results even in the same selec­tion of T1 patients, whereby the observed local recurrencerate increased from 8% to 18% for T1
1 Historical Perspectives and Rationale for Development
lesions and, even a more alarmingly, from 18% to 37% for the T2 cancers treated in this fashion [1214]. Parallel to these results, the technique for radical surgery was evolving. Lead by RJ Heald, total mesorectal excision (TME) was being implemented around the globe. It was learnt that through proper sharp dissection along the embryonic plane of the TME envelope, local recurrence for stage I rectal cancer could be reduced to 7.1% [15]. Parks TAE had inferior oncologic results compared to new-era TME sur­gery [12, 16]. The awareness that the improve­ment on patient’s quality of life with local excision and organ-sparing surgery was at the expense of worse oncologic outcomes resulted in an overall decrease on the use of local excision for invasive lesions [17].

Transanal Endoscopic Microsurgery (TEM)

5
Surgical evolution has been largely inuenced by instrumentation development, and the advances in the technique of local excision would undoubt­edly come from creative applications of these advancements. The discovery of the rst rigid endoscopes presented by Desormeaux in 1865 later would evolve into the rst beroptic endo­scopic procedure in 1957 [18], heralding the new era of laparoscopy and minimally invasive sur­gery, which would nd tting applications in the late 1980s toward a multitude of common abdom­inal operations [1820].
In such a way, the design of an advanced endoscopic transanal platform with an endo­scopic camera and laparoscopic-style surgical instruments would yield access to the rectal cav­ity with superior visibility when compared to the traditional Parks approach and even provided access to more proximal lesions that were not accessible before with conventional techniques for local excision.
In 1983, predating the rst laparoscopic chole­cystectomy by a few years, Dr. Gerhard Buess designed transanal endoscopic microsurgery (TEM) (Fig. 1.2). It was a platform that, for the rst time, allowed for excision of benign neoplasia
Fig. 1.2 Transanal endoscopic microsurgery (TEM) equipment. Developed in 1983 by Gerhard Buess, It allowed for high denition access to the rectal vault for the purpose of performing local excision
of the mid and upper rectum [21]. TEM consists of a rigid transanal platform, which allows insufat­ing of the rectal cavity, creating a pneumorectum. TEM has three working channels, one for a xed camera and other two for working instruments (cautery, suction, suture, etc.). The improved visu­alization from a stereoscopic magnied view in the pneumatically distended rectum allows for precise excision in an operative space that would be otherwise difcult to reach. Initially, Buess designed TEM for local excision of nonmalignant lesions not within reach of conventional transanal methods, addressing the limitations of the Parks excision. It was not designed with the purpose of performing higher-quality excision. However, the platform was soon utilized also for resection at any level of the rectum and for early malignant lesions, since TEM became increasingly recognized as the better platform for this [22].
6
Since its rst description, the use of TEM has proven to result in high-quality excisions with outcomes that were more favorable than standard transanal techniques for local excision, with a low recurrence rate [2329]. Winde et al. [22] described no difference in disease-free and over­all survival for patients with T1 rectal cancer operated with local excision viaTEM versus radi­calresection. A 10-year single center experience demonstrated that for 70 patients who underwent TEM for T1 rectal cancer, a local recurrence rate of 8.5% was observed [30]. Furthermore, data surmised from other studies, indicated that local excision via the traditional (Parks) approach has inferior 5-year survival rates compared to anterior resection for patients with T1N0M0 disease; while, when local excision of T1 lesions was per­formed with TEM, the oncologic results were comparable to those achieved with radical surgery for early rectal cancer [16, 31, 32].
For 25 years, TEM was the only available advanced transanal platform. However, this advanced transanal platform required specic instrumentation (with associated higher cost), posed ergonomic difculties, and resulted in a steep learning curvefor even experienced train­ees [33, 34]. The economic pressure for cost con­tainment in the healthcare system limited the investment in TEM, and few institutions could afford the TEM apparatus, as a high volume of cases was necessary to amortize the price of the platform [20]. For these reasons, widespread adoption was limited, and TEM for local excision remains, to this day, an operative technique pri­marily performed by a small number of high­volume specialists in referral centers [35, 36]. Over the decades, the system’s design has not been signicantly modied, and it is essentially unchanged since its development by G. Buess. Transanal endoscopic operation (TEO) (Fig.1.3) emerged as a similar platform to TEM, with anal­ogous principles, indications, and results [37]. Together, TEO and TEM are considered advanced transanal platforms capable of performing high­quality excision of rectal neoplasia. They are often referred to as “rigid platforms.” In general, most experts believe the quality of excision achievable with TEM and TEO is the same.
S. W. Larach and B. Martín-Pérez
Fig. 1.3 Transanal endoscopic operation (TEO) plat­form. (Reproduced with permission of Karl Storz SE & Co.)

Transanal Minimally Invasive Surgery (TAMIS)

The beginning of the twenty-rst century was marked by further evolution in abdominal lapa­roscopy and abdominal access strategies. Meanwhile, the concept of natural orice translu­minal endoscopic surgery (NOTES) emerged in
2004. This led to the idea of consolidating laparo­scopic trocars into a combined port that could be delivered through the umbilicus (an embryonic natural orice). Thus, the birth of the “single port” was based on (a) decreased abdominal wall access trauma and (b) the ability to provide a minimally invasive route via an embryonic natural orice. Although the concept of single-wound minimally invasive access was reported by Pelosi et al. in 1992 as a transumbilical approach for appendec­tomy [38], it was not until the mid- 2000s, in the wake of NOTES, that single ports were manufac­tured, and this approach was subsequently applied to a broad range of abdominalprocedures includ­ing colonic resection [39, 40].
Although not intended by design to be used for transanal access, the single port seemed ideal for this purpose. In 2009, this was performed for the rst time, giving birth to a new operation for rectal surgery. The new approach would have a profound effect on how colorectal surgeons would operate within the rectum. The technique was termed transanal minimally invasive surgery (TAMIS) by its founders S. Atallah, M. Albert, and SW.Larach [41].
1 Historical Perspectives and Rationale for Development
7
It is often said that necessity is the mother of
invention. TAMIS represented an alternate option
for advanced transanal access for surgeons and hospital systems that did not have the highly spe­cialized and costly TEM system. After all, TAMIS was simple to set up, relied on conventional lapa­roscopic equipment, and was predicated on lapa­roscopic skills and familiar techniques. Additionally, TAMIS did not appear to have a long learning curve and did not require special­ized training (as is the case with TEM) [41]. TAMIS provided the surgeon with improved visu­alization and reach. In short, it allowed colorectal surgeons to translate their familiar laparoscopic skill set to transanal surgery, which resulted in rapid dissemination of the TAMIS technique [42].
The rst platform placed transanally and the rst series reported on TAMIS utilized the SILS Port (Covidien, Manseld, MA) (Fig.1.4). While suitable for access, this and other single ports were not designed for transanal access and required modication. An important limit of the SILS port was that it did not allow for access into the lumen, without completely removing the port; there were other limitations as well, includ­ing cannula diameter which was restricted to 5mm at the time.
With input from the surgeons who developed TAMIS, dedicated platforms were designed spe­cically for transanal access– the rst of which
remains the one most widely used today: Namely, the GelPOINT path transanal access platform (Applied Medical, Inc., Rancho Santa Margarita, CA) (Fig.1.5). The GelPOINT Path, often simply referred to as the “TAMIS Port”, is constructed from single-use exible material composed of two main parts, an access channel and a remov­able lid. Three 10mm cannulas are usually used, one for the camera lens and two working ports, through which standard laparoscopicinstruments can be introduced. The TAMIS platform isquite versatile and even allows for robotic access – a technique termed robotic TAMIS or robotic trans­anal surgery (RTS) [4345].
TAMIS utilization has rapidly spread world­wide because of its accessibility and the increas­ing number of training courses available for surgeons. Its global adoption has been reected by the increasing number of publications and citations since 2009 [36, 42, 4660].

Future of TAMIS

TAMIS was created to evolve, and not remain static. The future will likely represent new ave­nues for TAMIS as surgeons explore new applica­tions. To date, many applications beyond local excision have been realized. Most notably, TAMIS became the standard route of access for the
Fig. 1.4 Shown is a Single-Incision Laparoscopic (SILS) Port.Although it was not intended to be used transanally, it was used to develop the TAMIS technique.The SILSportwas used for all cases published in the rst series on TAMIS and predated the creation of TAMIS- specic ports
Fig. 1.5 Transanal minimally invasive surgery (TAMIS) platform, or TAMIS Port.This devicewas developed spe­cically for transanal access and was created and designed with the aid of the surgeons who developed the technique
8
Radical Excision Local Excision
Evolution and Milestones in Rectal Surgery
S. W. Larach and B. Martín-Pérez
1820’s
Perineal
colostomy
Dr. Lisfranc (1)
Posterior access
Dr. Verneuil
Dr. Kraske (2)
Transanal excision
Dr. Parks (9)
1950’s
1908
Abdominoperineal
resection
Dr. Miles (3)
TEM
Transanal
Endoscopic
Microsurgery
Dr. Buess (23)
1983
1980’s
Total Mesorectal
Excision(TME)
Dr. Heald(16)
TEO
Transanal
Endoscopic
Operation
(25, 26)
1990’s
Laparoscopic
Colorectal surgery
Dr. Jacobs, Dr. Larach,
Dr. Wexner,
Dr. Franklin &
Dr. Nelson (40–44)
Fig. 1.6 Evolution and milestones in rectal surgery
modern day transanal total mesorectal excision. From a technical standpoint, further instrumenta­tion and platform renementswill likely contrib­ute to the advancement of TAMIS. Next- generation exible robotic transanal systems are poised to be part of the future evolution of TAMIS.
Figure 1.6 shows the evolution and milestones
in rectal surgery.

Conclusion

TAMIS arose serendipitously and represents an amalgam of innovations in laparoscopy, single­port surgery, NOTES, and TEM. The impetus behind its development was the need for improved access to the rectal lumen, thereby providing a practical and effective alternative to TEM.

References

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Transanal minimally
Invasive Surgery
(TAMIS)
Dr. Larach, Dr. Atallah
& Dr. Albert (54)
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Single Port Surgery
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