Extracorporeal irradiation: biological reconstruction following tumor resection with a large bone defect

Abstract:

:Összefoglaló. A malignus csonttumorok sebészi ellátása során kialakuló szegmentális csontdefektusok pótlása fontos szempont a végtagmegtartó sebészetben. Felnőttkorban a megoldás rendszerint tumorprotézis beültetése, 10 évesnél fiatalabb gyermekeknél azonban ez nehezen alkalmazható módszer a kis csontméret és az igen magas várható szövődményarány miatt. A bemutatott, hazánkban még ritkán alkalmazott beavatkozás, a tumoros csontszegmentum műtét alatti sugárkezelése, visszaültetése megfelelő rekonstrukciós lehetőség a végtag funkciójának megtartása mellett, csökkentve a későbbi reoperációk, protézisrevíziók számát. Célkitűzés: A hazánkban eddig az ismertetett módon végzett műtétek bemutatása, az eredmények összevetése nemzetközi irodalmi adatokkal. Módszer: Magyaroszágon eddig 12 alkalommal végeztünk végtagmegtartó műtétet malignus csonttumor miatt 12 évesnél fiatalabb gyermekeknél, és e műtétek során biológiai rekonstrukciós módszerként extracorporalis irradiatiót, autograft-reimplantatiót (ECRT, ECI) végeztünk. A műtétek mindegyike primer malignus csonttumor (Ewing-sarcoma 7 esetben, osteosarcoma 4 esetben, chondrosarcoma 1 esetben) miatt történt. Betegeink átlagéletkora 9 (3-12) év volt, az átlagos utánkövetési idő 32,5 (2-73) hónap. A felmérés során fizikális vizsgálat, valamint minden alkalommal röntgenfelvételek készítése történt, szükség esetén szövettani mintavétellel, vérelemzéssel vagy egyéb képalkotással kiegészítve. Eredményeinket nemzetközi irodalmi adatokkal hasonlítottuk össze. Eredmények: Lokális tumorkiújulást egyetlen esetben sem észleltünk, másik csontot érintő skip ('ugró') metastasis miatt egy alkalommal amputatiót végeztünk. A szövődmények tekintetében eredményeink megfelelnek a nemzetközi irodalomban leírtaknak. Két esetben jelentkezett szeptikus szövődmény (16,7%). A resectiós sík radiológiai átépülése 3-9 hónap alatt történt meg az esetek 60%-ában. Álízület, grafttörés, graft részleges elhalása miatt 3 esetben végeztünk reoperációt, kétszer újabb allograft felhasználásával, egy esetben pedig tumorprotézis beültetésével. Betegeink szubjektív véleménye a módszerről pozitív, a legtöbb esetben megőrizték jó fizikai aktivitásukat, az esetleges reoperációk ellenére végtagjukat terhelik, akár sporttevékenységet is végeznek. Következtetések: Vizsgálatunk alapján az extracorporalis irradiatio hasznos biológiai rekonstrukciós módszer 12 évesnél fiatalabb gyermekek esetében szegmentális csontdefektusok pótlására tumoros indikációval. A felmerülő szövődmények aránya alatta marad a hasonló korban beültetett tumorprotézisek szövődményarányainak, ideális esetben pedig több, további kiterjesztett műtét elkerülhető vele. Szövődmény esetén a későbbiekben tumorprotézis-beültetés mint végtagmegtartó vészmegoldás még mindig elvégezhető. Orv Hetil. 2020; 161(45): 1914-1919. SUMMARY: INTRODUCTION:Reconstruction of massive segmental bone defects is a crucial point of limb salvage surgeries after malignant bone tumor resections. Megaendoprostheses implantation is a commonly used method for adult patients, but hardly usable for children below 12 years old, because of the small size of the host bone and multiple mechanic complications. OBJECTIVE:Extracorporeal irradiation and allograft reimplantation (ECRT, ECI) are promising methods for these young children for limb salvage, reducing the number of prostheses revisions, reoperations. METHOD:In Hungary, we performed limb salvage surgery for malignant bone tumor in 12 cases in children under 12 years old, using extracorporeally irradiated autografts as biological reconstruction. All cases were primary bone tumors (Ewing's sarcoma: 7, osteosarcoma: 4, chondrosarcoma: 1). The average age of our patients was 9 (3-12) years, the average follow-up was 32.5 (2-73) months. At follow-up, we performed physical examination, X-ray, and other imaging methods if they were necessary. Our results were compared to international publications. RESULTS:We observed no local recurrence, but in one case we had to perform above-knee amputation, due to a skip metastasis in the proximal tibia. The complication rates were similar to those reported in other papers. Septic complications were treated in two cases (16.7%). Total union of the resection lines was observed at 3-9 months in 60% of all cases. Reoperations were performed due to nonunion, or allograft fracture/partly desorganization in 3 cases, twice with new allograft, and with prostheses in one case. The subjective opinion of our patients is positive, they walk with full weightbearing, some of them do even light sporting activities. CONCLUSIONS:We found extracorporeal irradiation a useful and safe method for children under 12 years old for biological reconstruction after malignant bone tumor resection. Complication rate stays under the rate of growing prostheses complications, in optimal cases further radical, and extensive surgeries may be avoided. In the case of major complications, megaendoprostheses implantation later on is still an option as salvage procedure with limb salvage. Orv Hetil. 2020; 161(45): 1914-1919.

journal_name

Orv Hetil

journal_title

Orvosi hetilap

authors

Perlaky T,Kiss J,Szalay K,Maysam MA,Ágoston P,Szendrői M

doi

10.1556/650.2020.31767

subject

Has Abstract

pub_date

2020-11-08 00:00:00

pages

1914-1919

issue

45

eissn

0030-6002

issn

1788-6120

journal_volume

161

pub_type

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