The role of liver-specific contrast-enhanced MRI before resection of colorectal liver metastases / Májsejtspecifikus kontrasztanyaggal végzett MR-vizsgálat alkalmazása colorectalis eredetu májáttétek reszekciója elott.

Összefoglaló. Bevezetés: A colorectalis eredetu májáttétek (CRCLM-ek) kuratív célú kezelésében elsodleges a sebészi reszekció. A mutét elott különbözo képalkotó vizsgálatok végezhetok, az egyik ilyen speciális vizsgálat a májsejtspecifikus kontrasztanyaggal végzett MR-vizsgálat. Célkituzés: Tanulmányunkban a májsejtspecifikus kontrasztanyaggal végzett MR-vizsgálat helyét és szerepét vizsgáltuk a májsebészeti gyakorlatban colorectalis áttétes betegek esetében. Módszer: Az Uzsoki Utcai Kórház Sebészeti-Onkosebészeti Osztályán 2017. 01. 01. és 2019. 12. 31. között CRCLM miatt májreszekcióra kerülo betegek adatait elemeztük. Retrospektív módon vizsgáltuk a betegek általános sebészeti és onkosebészeti paramétereit, a képalkotó diagnosztikai eredményeket, a mutéti adatokat és a patológiai leleteket. Eredmények: 132, CRCLM miatt operált betegbol 73 szoliter áttét (55%), míg 59 beteg (45%) többszörös áttét miatt került mutétre. 94 betegnél (71%) történt májsejtspecifikus MR-vizsgálat. Szoliter áttét esetén 60%-ban, multiplex áttétek esetén 85%-ban történt májsejtspecifikus MR-vizsgálat (p = 0,02). A szoliter áttétes betegek 8%-ában, míg a multiplex áttétes betegek 39%-ában mutatott további áttétet a májspecifikus kontrasztanyaggal végzett MR-vizsgálat (p = 0,001). A betegek 5%-ában igazolódott fals pozitivitás és 6%-ában fals negativitás a májsejtspecifikus MR-vizsgálat során. 264 góc vizsgálata alapján a májspecifikus kontrasztanyaggal végzett MR-vizsgálat szenzitivitása CRCLM esetén 95%-os, míg pozitív prediktív értéke 93%-os volt vizsgálatunkban. Következtetés: A májsejtspecifikus kontrasztanyaggal végzett MR-vizsgálat hasznos diagnosztikai módszer a CRCLM-ek sebészi reszekciója elott. Leginkább többszörös áttétek esetén, preoperatív szisztémás onkológiai kezelést követoen, illetve más képalkotó vizsgálaton igazolt eltunt áttét esetén javasolható az alkalmazása. Orv Hetil. 2021; 162(50): 2010-2016. INTRODUCTION: Liver resection is the only curtive treatment option of colorectal cancer liver metastases (CRCLMs). While different diagnostic modalities are available before surgery, a specific diagnostic tool is the liver-specific contrast-enhanced MRI. OBJECTIVE: The purpose of this study was to evaluate the role of liver-specific contrast-enhanced MRI before resection of colorectal liver metastases. METHOD: Patients with CRCLM, resected at the Department of Surgical Oncology, Uzsoki Teaching Hospital, between 01. 01. 2017 and 31. 12. 2019 were enrolled in our study. Clinical data, diagnostic, intraoperative and pathological findings were analyzed in a retrospective setting. RESULTS: 132 CRCLM patients were resected in this period, 73 patients had solitary (55%), and 59 patients (45%) had multiple metastases. Liver-specific contrast-enhanced MRI was performed in 94 patients (71%). 60% of the patients with solitary and 85% of the patients with multiple CRCLM had liver-specific contrast-enhanced MRI (p = 0.02). Compared to other modalities, liver-specific contrast-enhanced MRI showed additional metastases in 8% of the patients with solitary, and in 39% of the patients with multiple metastases (p = 0.001). Liver-specific contrast-enhanced MRI had a 5% false-positivity and a 6% false-negativity rate. 264 leasions were analyzed, and the sensitivity of the liver-specific contrast-enhanced MRI was 95% with a predictive positive value of 93%. CONCLUSION: Liver-specific contrast-enhanced MRI is a useful diagnostic tool in CRCLM patients before liver resection. It is highly recommended in the case of multiple metastases, after preoperative chemotherapy and in the case of disappearing metastases. Orv Hetil. 2021; 162(50): 2010-2016.

Segmentation of knee cartilages in MR images with artificial intelligence / Térdporc szegmentálása MR-felvételekbol mesterséges intelligencia segítségével.

Összefoglaló. Bevezetés: A térdízületnek ultrafriss osteochondralis allograft segítségével történo részleges ortopédiai rekonstrukciója képalkotó vizsgálatokon alapuló pontos tervezést igényel, mely folyamatban a morfológia felismerésére képes mesterséges intelligencia nagy segítséget jelenthet. Célkituzés: Jelen kutatásunk célja a porc morfológiájának MR-felvételen történo felismerésére alkalmas mesterséges intelligencia kifejlesztése volt. Módszer: A feladatra legalkalmasabb MR-szekvencia meghatározása és 180 térd-MR-felvétel elkészítése után a mesterséges intelligencia tanításához manuálisan és félautomata szegmentálási módszerrel bejelölt porckontúrokkal tréninghalmazt hoztunk létre. A mély convolutiós neuralis hálózaton alapuló mesterséges intelligenciát ezekkel az adatokkal tanítottuk be. Eredmények: Munkánk eredménye, hogy a mesterséges intelligencia képes a meghatározott szekvenciájú MR-felvételen a porcnak a mutéti tervezéshez szükséges pontosságú bejelölésére, mely az elso lépés a gép által végzett mutéti tervezés felé. Következtetés: A választott technológia - a mesterséges intelligencia - alkalmasnak tunik a porc geometriájával kapcsolatos feladatok megoldására, ami széles köru alkalmazási lehetoséget teremt az ízületi terápiában. Orv Hetil. 2021; 162(9): 352-360. INTRODUCTION: The partial orthopedic reconstruction of the knee joint with an osteochondral allograft requires precise planning based on medical imaging reliant; an artificial intelligence capable of determining the morphology of the cartilage tissue can be of great help in such a planning. OBJECTIVE: We aimed to develop and train an artificial intelligence capable of determining the cartilage morphology in a knee joint based on an MR image. METHOD: After having determined the most appropriate MR sequence to use for this project and having acquired 180 knee MR images, we created the training set for the artificial intelligence by manually and semi-automatically segmenting the contours of the cartilage in the images. We then trained the neural network with this dataset. RESULTS: As a result of our work, the artificial intelligence is capable to determine the morphology of the cartilage tissue in the MR image to a level of accuracy that is sufficient for surgery planning, therefore we have made the first step towards machine-planned surgeries. CONCLUSION: The selected technology - artificial intelligence - seems capable of solving tasks related to cartilage geometry, creating a wide range of application opportunities in joint therapy. Orv Hetil. 2021; 162(9): 352-360.

Triple test score for the evaluation of invasive ductal and lobular breast cancer.

The aim of our study was to compare the preoperative sum score diagnostics of invasive ductal and lobular cancers using three or four diagnostic methods. The novelty of this study is the examination of this phenomenon based on sum score, no such papers can be found in the literature. Ductal cancers have higher score values indicating easier diagnostics, but the difference in distribution of the scores was significant (p = 0.0086) only in case of the triple-test. The score values give appropriate opportunity to create their order of diagnostic power which was the same by both histologic types and in their subgroups with low sum-score: the strongest was cytology, followed by mammography, ultrasound and physical examination. No significant difference was found between the two histologic group in their mammographic appearances-stellate, circumscribed, assymmetric distortion or microcalcification-(p = 0.0694). In low score subgroup besides the occult forms, structural distortion and indeterminate microcalcifications overweighed the stellate and circumscribed lesions typical for the whole groups. In symptomless cases of both histologic groups only one strongly malignant diagnostic test result warrants the right diagnosis. Summarizing the score distribution of the results in case of four diagnostic tools the higher scores-indicating malignancy-were more frequent in the ductal group compared to the lobular ones. Extra attention has to be paid to rare radiomorphologic appearances and to the most deterministic examination, namely cytology.

Radial scar-significant diagnostic challenge.

The prevalence of radial scar (RS) is 0.04% in asymptomatic women participating in population screening for breast cancer. It is important to differentiate RS from concomitant malignancies, which occur in 20-30% of patients, or from small stellate carcinomas which give similar radiomorphology. The aim of our study was to evaluate the effectivity of current breast diagnostic methods in distinguishing between real RS, concomitant malignancy and carcinomas imitating RS. Diagnosis of RS was set up in 61 cases by mammography. Forty-four patients underwent surgical excision: histology showed benign or malignant lesions in 28 and 16 cases, respectively. A series of negative results at follow-up proved the benign nature of the lesion in further 11 cases. Six patients were not available for follow-up. Results of mammography, physical examination, ultrasonography and cytology were evaluated and were compared in 39 benign and 16 malignant cases. Results of examinations were reported on the BI-RADS scale ranging from 1 to 5. The mean categorical scores of all diagnostic processes were around the level of borderline lesions: mammography: 3.49, ultrasonography: 3.06, cytology: 2.47 and physical examination: 1.67. The average age of the patients in the benign and malignant groups were the same: 58 years. The two groups did not differ significantly over either distribution of coded mammographical results (p = 0.2092), or the distribution of mammographical parenchyma density patterns (p = 0.4875). However, the malignant and benign groups differed significantly from each other over the distribution of coded ultrasonographic (p = 0.0176) and cytological (p < 0.0001) results. In conclusion, in the preoperative diagnosis of asymptomatic "black-stars", mammography detects the non-palpable lesions, and ultrasonography together with cytology proved better in the analysis, provided FNAB is US guided. Due to the complex diagnostic approach the nature of the "black stars" is known in the majority of cases prior to the surgical biopsy.

[Invasive lobular breast cancer: pitfall for the radiologist?]. / Invazív lobularis emlorák--csapdában a radiológus?

BACKGROUND: Invasive lobular carcinoma accounts for 5-10% of all breast cancers and is associated with subtle clinical and mammographic changes. It is also frequently multifocal and traditional diagnostic methods are unable to reliably detect this preoperatively. The aim of the study was to evaluate the ability of current imaging modalities to detect and analyze invasive lobular carcinomas as compared to invasive ductal carcinomas. MATERIAL AND METHODS: A retrospective analysis of 396 invasive carcinomas - 331 ductal (84%) and 65 lobular (16%) - between 2000 and 2002 was performed. The two group were compared on the basis of result of mammography, physical examination, ultrasound, and cytology using a coded system points 1-5 concerning the malignancy. RESULTS: The sensitivity of mammography and sonography for malignancy were higher in case of ductal carcinomas (81%, 77.4%), then by lobular cancers (75%, 72.2%), but the differences were not significant (p=0.4693 and p=0.4227 respectively). The radio-morphologic analysis shows the most frequent image was the stellate lesion in both group, but the difficult detectable structural distortions were found in 14.2% in lobular cancer- group, but only in 5.1% in case of ductal cancers without significance (p=0.5523). The clinical examination could predict the malignancy least of all, in the ductal group 42%, in the lobular group 40.2%. The cytology produced the best diagnostic result for malignancy in the ductal group 86.2%, and in the lobular group 76.5% was observed, the difference is significant (p=0.0069). CONCLUSION: Although all elements of triplet diagnostics produces were more uncertain for malignancy in case of lobular carcinomas than ductal one, combining the result of the three radiological modalities and cytology increase the preoperative detection rate of lobular carcinoma.

[Hemobilia as a rare vascular complication of chronic pancreatitis]. / Erózios vérzéssel szövodött krónikus pancreatitis mint a hemobilia egy különleges esete.

Hemobilia is one of the possible causes of upper GI tract bleeding of unknown origin. However hemobilia is usually iatrogenic or traumatic, it can originate as a result of inflammation or may be caused by tumors. Authors present the case of a 46-year-old man, who developed hemobilia as a vascular complication of chronic pancreatitis. Diagnosis was proved on angiography and surgical intervention was necessary because of the life-threatening hemorrhage. Cholecystectomy, T-drainage and cystoduodenostomy were performed. We describe symptoms, diagnostic and therapeutic approches and compare it to recent literature.

[Effect of hormone replacement therapy on the mammographic density of the female breast]. / A hormonpótló kezelés hatása az emlo radiológiai denzitására.

BACKGROUND: Mammographic parenchymal patterns are of particular interest because the denser patterns reduce sensitivity and they have been shown to be affected by exogenous oestrogens. PURPOSE: To evaluate the possible effects of peri- and postmenopausal hormone replacement therapy (HRT) on the mammographic density in the different types of parenchymal patterns. PATIENTS AND METHODS: During a period of 7 years (average: 3.44), 1158 women with combined or monophasic HRT were checked with mammography yearly. Their base-line mammograms were compared with those of 1433 screening participants of the same age (average 56 years). Mammograms were evaluated according to the Tabar classification. We studied the changes in density between two examinations in the HRT group, especially in the subgroup with benign lesion. RESULTS: In comparison of the HRT and screening group, the distribution of their parenchymal patterns were similar. Pattern I (glandular) and II (adipose) eventually dominated, 38.9% and 47.9% in the HRT group, and 34.0% and 42.2% in the screening group. Pattern IV (adenotic) and V (fibrotic) types have been found in 8.9% of the HRT group, and 13.1% of the screening group. During HRT, an increase of breast density has developed after a few months, then it remained unchanged. Density increased in 30.8% of the whole HRT group, and in 38.0% of women who had benign lesions as well. Although there was a significant increase in breast density in case of pattern I-II and III (p=0.0013), pattern IV and V remained totally unchanged. The distribution of the patterns has changed significantly (p=0.0000) during HRT: the proportion of pattern I (glandular) type increased from 38.9% to 51.3%, pattern II (adipose) decreased from 47.9% to 30.6%, while the IV (adenotic) and V (fibrotic) types together showed no change. CONCLUSION: Careful clinical and mammographic follow-up might be appropriate in women undergoing HRT, especially in those with benign lesion, because the HRT-induced increase in breast density proved significant.