Minimum ten-year outcome of a triple-tapered femoral stem implanted with line-to-line cementing technique.

BACKGROUND: A triple-tapered polished femoral stem was implanted with line-to-line cementing technique. The purpose of this study was to determine the survivorship, loosening rate, stem subsidence, radiologic changes and clinical outcomes in the minimum 10-year follow-up. METHODS: This was a retrospective study done in three institutes. Finally, 118 hips in 97 patients could be followed-up at the mean follow-up period of 126.3 months. The survivorship, radiological and clinical outcomes were investigated. RESULTS: Radiologically, 107 hips (90.7%) were categorized to Barrack cementing grade A, and 108 stems (91.5%) were inserted in neutral position. All hips were not loose and were not revised due to any reason. Survival with revision for any reason as the endpoint was 100% after 10 years. At the last follow-up, the mean subsidence was 0.43 mm, and the subsidence was less than 1 mm in 110 hips (93.2%). JOA hip score improved from 42.7 ± 8.9 points preoperatively to 92.8 ± 6.8 points at the last follow-up. No patient complained thigh pain. CONCLUSIONS: Line-to-line cementing technique with use of a triple-tapered polished stem was effective to achieve good cementation quality and centralization of the stem. The subsidence was small, and the minimum 10-year results were excellent without any failures related to the stem. TRIAL REGISTRATION: Retrospectively registered.

[A Case of Pancreatic Pseudocyst Recurrence after Surgery for Remnant Pancreatic Cancer].

The patient was a 72-year-old man with a history of pancreatic cancer and IPMA treated with distal pancreatectomy. He had recurrence-free period after adjuvant chemotherapy with S-1. But 6 years after the surgery, a diameter of 1 cm mass was noted in the remnant pancreas on MRI examination after hepatocellular carcinoma treatment. The mass was diagnosed as remnant pancreatic cancer, and he had undergone partial pancreatectomy of remnant pancreas. The pathological diagnosis was pancreatic ductal carcinoma with negative margin. However, 6 months after the reoperation, epigastric pain appeared, and CT scan showed a pseudocyst of 10 cm in size. The diagnosis was local recurrence with positive cytology, and then puncture drainage was performed. After repeated drainages, adhesion of the cystic lesion, and chemotherapy, the cytology became negative and the cystic lesion disappeared, but peritoneal dissemination metastasis also appeared. The patient died of the primary disease 7 years and 8 months after the first surgery and 1 year and 11 months after the second surgery. There has been no report of local recurrence in the form of pancreatic pseudocyst after pancreatic cancer surgery, and we report this case with literature discussion.

[A Case Report of Hepatocellular Carcinoma with Complete Spontaneous Regression].

This is the case of a 77-year-old man with hepatitis C. AFP was increased by 95.9 ng/mL, and abdominal computed tomography(CT)revealed a 20 mm mass in the S6 segment of the liver. Therefore, the patient was referred to our hospital for further examination. Abdominal echo at our hospital showed a 10 mm, low echoic lesion in S6, which tended to shrink. Similarly, CT showed a low-concentration nodule of 10 mm in S6, but the contrast effect in the arterial phase was not clear. EOB-MRI showed a 10 mm nodule of DWI hyperintensity and hepatocyte phase hypointensity in S6. Based on these, a diagnosis of hepatocellular carcinoma(T1N0M0, StageⅠ)was made, and we decided to perform surgery. Intraoperative findings showed no tumor on the liver surface, and echo did not reveal a reproducible nodule. The tumor site was estimated using a 3-dimensional image analysis system created preoperatively. Laparoscopic partial resection of the liver S6 segment was performed at a position distant from the estimated tumor site. Rapid pathological examination showed no malignant findings, but no significant lesion was found in the residual liver, and the surgery was completed. The postoperative pathological diagnosis revealed no clear tumor. EOB-MRI was performed again postoperatively, but no tumor was found in the residual liver. The tumor site that had been indicated preoperatively was resected, and we hypothesized that the hepatocellular carcinoma had spontaneously regressed. Although several mechanisms have been reported for the spontaneous regression of hepatocellular carcinoma, few cases of spontaneous regression during surgery have been reported. We do not have a definite opinion on the treatment protocol for hepatocellular carcinoma that regresses spontaneously; therefore, we will report on past cases.

[A Case Report of Long Survival in Pancreatic Cancer with Superior Mesenteric Arterial Invasion Following Multimodal Therapy].

The prognosis of pancreatic cancer with superior mesenteric arterial invasion is very poor and judgment of surgical indication is very difficult. We report a case that received multimodal therapy for pancreatic cancer with superior mesenteric arterial invasion. A 43-year-old woman consulted a local doctor because of upper abdominal pain. Ultrasonography revealed a nodule in the pancreatic body and elevated CA19-9 values. She was referred to our hospital for evaluation and therapy. Computed tomography showed a low-density area in the pancreatic body and around the superior mesenteric artery. The clinical diagnosis was pancreatic cancer with superior mesenteric arterial invasion. She received chemoradiation therapy(RT, 50.4 Gy, gemcitabine[GEM]plus TS-1)followed by distal pancreatectomy. She received adjuvant chemotherapy(TS-1)for 6 months. However, follow-up CTperformed 10 months after surgery revealed local recurrence. The patient received chemotherapy( GEM)for 8 months and GEM plus nab-PTX for 22 months. She died from the cancer 50 months after the primary operation.

[A Case of Chemotherapy with Abscess Drainage for Pancreatic Cancer Detected Due to Peritonitis].

A 69-year-old woman was admitted to our hospital because of abdominal pain. Abdominal CT revealed free air, so we performed an emergency operation. Although the perforation site could not be confirmed, pancreatic cancer invading the stomach, spleen, and transverse colon was found. As a splenic abscess and peritoneal dissemination were also found, we created a colostomy and placed drains. Although the postoperative course was good, the splenic abscess continuous with the tumor remained. We thought that early removal of the drain would be difficult, so chemotherapy was introduced while continuing drainage. Fortunately, the pancreatic cancer was controlled, and the abscess tended to shrink, so we removed the tube 137 days after the surgery. After that, we continued chemotherapy, but in the second year after the surgery, the liver metastasis acutely exacerbated and DIC also developed, resulting in cancer death. If surgical intervention is difficult, as in this case, chemotherapy may be considered as an option, keeping in mind the possibility of exacerbation of infection.

[A Case of Esophagogastric Junction Adenocarcinoma with Multiple Esophageal Intramural Metastases].

We experienced a case of multiple esophageal intramural metastasis from adenocarcinoma of the esophagogastric junction. A 58-year-old man was admitted complaining of dysphagia. Upper gastrointestinal endoscopy revealed a type 3 tumor at the esophagogastric junction. Biopsy showed Group 5, poorly differentiated adenocarcinoma. Abdominal CT indicated regional and para-aortic lymph node metastasis. Then the clinical diagnosis was established as Siewert type Ⅲ adenocarcinoma and cT4aN2M1(LYM), cStage Ⅳ. After conducting 4 courses of SP(S-1/cisplatin)therapy, endoscopy showed partial response of the primary tumor and the submucosal nodules in the lower esophagus. We performed lower esophagectomy and total gastrectomy by left thoracotomy and laparotomy. Six esophageal nodules were identified in the lower esophagus, and pathological examination proved the poorly differentiated adenocarcinoma. The esophageal tumors were diagnosed as intramural metastases. The patient showed hepatic and lymphatic recurrence 9 months after surgery, and died 15 months after surgery. Esophageal intramural metastasis from esophagogastric junction adenocarcinoma is relatively rare. We discuss this case along with a review of the literature.

[A Case of Peritoneal Dissemination of Hepatocellular Carcinoma after Laparoscopic Hepatectomy].

A 69-year-old man was found to have a hepatocellular carcinoma of 2.3 cm in diameter, with extrahepatic growth in liver S4 during follow-up for chronic hepatitis C and liver cirrhosis. We performed a laparoscopic partial liver resection, but the tumor capsule was injured by the retractor used to keep the working space at the bleeding site. The pathological diagnosis was moderately differentiated hepatocellular carcinoma(pT2N0M0, pStage Ⅱ). 7 months after the surgery, intrahepatic reoccurrence appeared. Thus, transcatheter arterial chemoembolization(TACE)and radiofrequency ablation were performed. However, a single recurrence ofperitoneal dissemination appeared 8 months after the reoperation. We selected laparoscopic operation this time. Intraperitoneally, we found 4 peritoneal disseminated lesions and resected all the lesions macroscopically. However, even after the resection, peritoneal dissemination recurred and increased. Therefore, we continued treatment with sorafenib and S-1 as systemic therapy, TACE and transcatheter arterial infusion(TAI)for the multiple recurrences in the liver, and radiotherapy for the peritoneal dissemination focuses. However, his general condition worsened, and liver failure occurred. Thus, he was shifted to complete palliative treatment and died 2 years 6 months after the initial operation. The recurrent form ofhepatocellular carcinoma is mainly an intrahepatic recurrence, and recurrence ofperitoneal dissemination is rare. In this case, the intraoperative operation was considered to be the possible cause ofthe recurrence.

[A Case of Alpha-Fetoprotein-Producing Gastric Cancer with Synchronous Liver Metastasis Achieving Recurrence-Free Survival for Five Years by Gastrectomy, Hepatectomy, and Adjuvant Chemotherapy].

a-fetoprotein(AFP)-producing gastric cancer is relatively rare and tends to show a poor prognosis because of hepatic and lymph node metastasis. We experienced a case of AFP-producing gastric cancer with synchronous liver metastasis wherein the patient survived for 5 years without recurrence after undergoing surgery and adjuvant chemotherapy. A 39-year-old woman was admitted to our hospital complaining of tarry stool. Upper gastrointestinal endoscopy revealed a 40mm type 2 tumor in the greater curvature of the lower gastric body, and abdominal CT indicated a 50mm liver metastasis at the S2 segment. The AFP serum level had risen to 71,000 ng/mL. We performed distal gastrectomy and hepatic left lateral segmentectomy. The primary gastric tumor and the hepatic metastasis were both positive for AFP by immunohistochemistry. After conducting 3 courses of S-1/CDDP(SP)therapy as adjuvant chemotherapy, the serum level of AFP had decreased to normal levels. Be- cause the level had risen to 116 ng/mL after a change to S-1 oral administration alone, we decided to re-start SP therapy and carried out 16 courses through the third postoperative year. The patient is still alive without recurrence 5 years after surgery.

[A Case of Urothelial Carcinoma Who Underwent Pancreaticoduodenectomy and Was Diagnosed with Groove Pancreatitis and Preoperatively Suffered from Duodenal Stenosis].

We report a case of a highly advanced urothelial carcinoma accompanied by duodenal stenosis with pancreaticoduodenectomy. A6 6-year-old man presented with upper abdominal pain and vomiting. Acute pancreatitis and hydronephrosis were diagnosed with urgent hospitalization, but jaundice appeared, and stenosis of the duodenum was also found. Thus, we suspected groove pancreatitis or pancreatic cancer, and performed pancreaticoduodenectomy. However, poorly differentiated adenocarcinoma was observed in the retroperitoneal dissection surface in the intraoperative rapid tissue and right hemicolectomy, right nephrectomy, and right ureteral resection were added to the diagnosis. The final diagnosis was urothelial carcinoma. GEM plus CBDCAtherapy was administered as adjuvant chemotherapy. However, obstructive jaundice, acute cholangitis, and acute pancreatitis developed due to occlusion of the intestine due to local recurrence 4 months after surgery. We attempted to reduce yellowing by PTCD; perforation of the small intestine also occurred and a drainage tube was placed in the abdominal cavity. Although a lull condition was obtained, intestinal obstruction due to cancer peritonitis worsened and the patient died 8 months after the operation. In this case, there was no hematuria before surgery and cytology results of urine were negative, so a diagnosis of urinary tract cancer was difficult. There was no report of duodenal stenosis due to urothelial carcinoma.

[Multimodality Therapy for Cecal Cancer with Peritoneal Dissemination].

We report a case of cecal cancer with peritoneal dissemination. A 72-year-old man with cecal cancer(pT4N2M0H0P3, pStage IV )underwent ileocecal resection in 2010. The patient received 106 courses of chemotherapy(FOLFIRI plus Cmab) for peritoneal dissemination after surgery. However, follow-up CT performed 50 months after primary resection detected liver metastasis, which was resected in 2015. The patient received 19 courses of chemotherapy(FOLFIRI plus Cmab)after hepatectomy. The peritoneal dissemination with the diaphragm, retroperitoneal and right inguinal region, were growing 20 months after the 2nd operation. Surgical resection of the peritoneal dissemination was performed in 2016. The patient is alive 81 months after the 1st operation.

Factors associated with diagnostic stage of hip osteoarthritis due to acetabular dysplasia among Japanese female patients: a cross-sectional study.

BACKGROUND: In Japan, the majority of hip osteoarthritis (OA) was caused by acetabular dysplasia, and about 90 % of patients were female. The present study focused on Japanese female patients with hip OA due to acetabular dysplasia, and examined the associated factors with OA staging at diagnosis, in special reference to body weight. METHODS: Study subjects were 336 Japanese women who were newly diagnosed with hip OA caused by acetabular dysplasia at 15 hospitals in 2008. The self-administered questionnaire elicited patients' body weight at age 20 and at OA diagnosis. Four ranked OA staging according to radiographic findings of the hip joint (pre-OA, initial stage, advanced stage or terminal stage) was regarded as the outcome index. Proportional odds models in logistic regression were used to calculate odds ratios (ORs) and 95 % confidence intervals (CIs) for severer stage of OA. RESULTS: At diagnosis, 45 % of patients suffered from terminal stage of OA, whereas 13 % and 14 % were categorized into pre-OA and initial stage, respectively. After adjustment for potential confounders, weight gain since age 20 revealed the increased ORs for severer OA stage at diagnosis (OR 2.02; 95 % CI, 1.07-3.80). Other significant characteristics were age (67+ vs. 20-49 years, OR 12.4), lower education (junior high school vs. junior college or higher, OR 4.00), parity (OR 2.19), lower acetabular head index (<60.0 vs. 71.1+, OR 2.36), and longer duration since symptom onset (6.0+ vs. <1.0 year, OR 2.94). CONCLUSIONS: Weight gain since age 20 might be involved in mechanisms of OA development, which is independent of age or severity of acetabular dysplasia.

Relationship of acetabular dysplasia in females with osteoarthritis of the hip to the distance between both anterior superior iliac spines.

BACKGROUND: Acetabular dysplasia (AD) is the main cause of hip osteoarthritis in Japan. A simple method to evaluate acetabular dysplasia would be helpful for early treatment or prevention of hip osteoarthritis. Acetabular dysplasia is reported to be associated with pathological transverse growth of the pelvis, indicating that the distance between the 2 anterior superior iliac spines might be useful for screening and detection of acetabular dysplasia. The purpose of this study was to determine if the acetabular dysplasia radiographic parameters are related to the distance between the 2 anterior superior iliac spines in patients with hip osteoarthritis. MATERIAL AND METHODS: In this study, data obtained in a previous multi-institutional examination of patients with hip osteoarthritis in Japan were evaluated. The anterior superior iliac spine distances of 176 female patients (mean age, 54 years; range, 18-85 years) were measured by physical examination. The relationship between the anterior superior iliac spine distance and acetabular dysplasia was analyzed, and the anterior superior iliac spine distances of the patients with acetabular dysplasia who were at relatively high risk for hip osteoarthritis were compared with that of the patients at lower risk. RESULTS: A statistically significant relationship between the anterior superior iliac spine distance and all of the acetabular dysplasia parameters was observed. The anterior superior iliac spine distances of the acetabular dysplasia patients with a relatively high risk for radiographic acetabular dysplasia parameters were significantly smaller than those of patients at lower risk. Even after adjustment for age, height, and weight, significantly increased relative risk for having high risk AD was found in patients with an ASIS distance of less than 24.5 cm. CONCLUSIONS: There was a significant relationship between the anterior superior iliac spine distance and the degree of acetabular dysplasia.

[A case of total hip arthroplasty for femoral head necrosis while using satralizumab for neuromyelitis optica spectrum disorders].

A 47-year-old woman developed right femoral head necrosis during long-term steroid use for neuromyelitis optica spectrum disorder. She underwent a total hip arthroplasty because her right hip pain persisted after satralizumab treatment. There were no postoperative infections. Under oral administration of tacrolimus 3 mg, prednisolone 11 mg, and acetaminophen 2,275 mg, her postoperative body temperature was less than 38°C and normalized in about 2 days after the operation. No parameters indicating worsening of inflammation were observed in the blood test. In satralizumab-treated patients, infection cannot be ruled out even without inflammatory findings. In particular, if a slight fever of the 37°C-range or a mildly high white blood cell count persists, paying attention to signs of infection and actively investigating the presence or absence of infection using medical image diagnostic devices are necessary.

Osteoarthritis hip joints in Japan: involvement of acetabular dysplasia.

BACKGROUND: We conducted a nationwide epidemiologic study regarding hip osteoarthritis (OA) in Japan, and a previous report found these patients to be unique in comparison to Caucasians. This report focused on the data regarding each hip joint, and the involvement of acetabular dysplasia with hip OA was analyzed. METHODS: Seven hundred twenty OA hips were examined. Sixty-five joints with osteonecrosis of the femoral head and 215 non-OA contralateral joints of the unilateral patients were examined as controls. The revised system of stage classification for hip OA of the Japanese Orthopedic Association (JOA) was used according to the reproducibility in order to ensure reliable data from the multiple institutions. The acetabular dysplasia indexes were also chosen according to the reproducibility and measured in the radiograph of bilateral hip joints. The clinical score was assessed using the JOA scoring system. The relative risk of the grade of acetabular dysplasia indexes for hip OA was calculated as the odds ratio and the 95% confidence interval. RESULTS: The stage of the OA joints deteriorated with increasing age. The clinical scores also decreased. The grade of the acetabular dysplasia indexes of the OA joints was significantly higher than that of the control joints. Each index of acetabular dysplasia demonstrated significantly increased odds ratios for hip OA. Among the OA joints, the deterioration of the OA stage was found to be significantly associated with an increasing grade of acetabular dysplasia. The odds ratio for OA deterioration in the acetabular dysplasia index was also obtained. The joints of females tended to have a higher grade and prevalence of acetabular dysplasia than those of males. CONCLUSIONS: These findings confirmed a high prevalence of acetabular dysplasia in hip OA joints in Japan. Acetabular dysplasia was one of the most important factors associated with hip OA.

Elevation of the femur in THA through a direct anterior approach: cadaver and clinical studies.

BACKGROUND: The direct anterior approach in THA is an intermuscular approach that requires no muscle detachment. However, it is difficult to elevate the proximal femur for access to the femoral canal. QUESTIONS/PURPOSES: We asked (1) which part of the capsule should be released to allow effective elevation of the proximal femur; (2) whether the release of the internal obturator tendon allows elevation; and (3) whether hip hyperextension reduces the ability to elevate the femur. METHODS: We conducted a cadaver study and a clinical study. In the first study, the elevation of the proximal femur was measured in 6 hips in 3 cadavers after excision of the anterior capsule, after the release of the superior capsule or the posterior capsule, after the release of the superior and posterior capsule, and after the release of the internal obturator tendon under traction of 70 N. Each hip was positioned at 0°, 15°, and 25° hyperextension. In the second study of 39 patients, the posterior capsule was released after the superior capsule in the first 13 hips, and the superior capsule was released after the posterior capsule in the next 26 hips. The elevation achieved for each hip was measured as in the cadaver study. RESULTS: In our cadaver study, hip elevation increased after superior capsule release but not after release of the internal obturator tendon. After superior capsule release, the ability to elevate the femur was not diminished by hip hyperextension. In our clinical study, elevation increased after superior capsule release. CONCLUSIONS: Superior capsule release was most effective of all releases for elevating the proximal femur in the direct anterior approach.

The risk of notching the anterior femoral cortex with the use of navigation systems in total knee arthroplasty.

Use of navigation systems has recently been introduced in total knee arthroplasty (TKA) to achieve more reliable prosthetic alignment. In the sagittal plane, there are two important requirements for navigation systems: (1) perpendicular cut to the femoral mechanical axis and (2) prevention of notching of anterior femoral cortex. These two requirements, however, may conflict. The angles between the line of the anterior femoral cortex and four sagittal femoral mechanical axes for navigation systems using radiographs of the entire lower extremity, while standing were measured and compared. These four sagittal axes simulated on the radiographs in navigation systems were in extension relative to the line of the anterior femoral cortex in 40-85% of cases in male and 65-100% in elderly female. The present study showed that navigation systems have the potential risk for notching of anterior femoral cortex.

Analysis of interobserver reliability for radiographic staging of coxarthrosis and indexes of acetabular dysplasia: a preliminary study.

BACKGROUND: We are planning a multicenter survey on coxarthrosis and acetabular dysplasia in Japan. To collect reliable data, we performed a preliminary study to elucidate the observer agreement on assessment items. METHODS: We collected radiographs of hip joints in eight patients with various findings of coxarthrosis. Twelve registered orthopedic specialists evaluated them regarding the roentgenographic stage of coxarthrosis and five indexes of acetabular dysplasia (acetabular angle, center-edge angle, acetabular roof obliquity, acetabular head quotient, approximate acetabular quotient). To assess observer agreement, we calculated the value of the kappa statistic for stages and the coefficient of variation for the indexes. The same 12 specialists then assessed the coxarthritis stage on the same radiographs 1 month after the first evaluation based on our own descriptions of the roentgenographic stages. RESULTS: For the first evaluation of the roentgenographic stage, the value of the kappa statistic was 0.448; and for the second evaluation it was 0.600. The results of the coefficient of variation for the indexes of acetabular dysplasia, ranked in ascending order, were as follows: acetabular angle, acetabular head quotient, acetabular roof obliquity, center-edge angle, approximate acetabular quotient. CONCLUSIONS: For the upcoming multicenter survey, clear descriptions of the stages of coxarthrosis and selection of appropriate indexes can be helpful for collecting dependable results.

TKA sagittal alignment with navigation systems and conventional techniques vary only a few degrees.

Navigation systems have been developed to achieve more reliable prosthetic alignment in TKAs. However, the component alignment in the sagittal plane is reportedly less reliable than in the coronal plane even with navigation systems. We measured and compared sagittal prosthetic alignments for TKAs with the conventional technique and three navigation approaches to establish reference frames, using radiographs of the entire lower extremity while standing. The sagittal alignments simulated on the radiographs with the conventional technique and navigation systems differed by a mean of 2 degrees to 4 degrees . Use of navigation systems resulted in a mean of 1 degrees to 4 degrees hyperextension between the femoral and tibial components and use of the conventional technique resulted in a mean of 1 degrees flexion. Use of different reference points on the distal femoral condyle for the navigation systems resulted in differences of as much as 3 degrees alignment in the sagittal plane. Although optimal prosthetic alignment for TKA in the sagittal plane is unknown, surgeons and technicians using navigation systems should be aware of this difference in the sagittal plane and the risk of hyperextension between the femoral and tibial components, which might be associated with osteolysis and anterior post-cam impingement.

Factors influencing the stability of stems fixed with impaction graft in vitro.

Mechanical stability of the stem is believed to be an important factor in successful impaction grafting in revision THA. We asked whether particle size, femoral bone deficiencies, stem design, graft composition, and impaction technique influenced the initial stability of the stem in vitro using model femora and human bone particles. Bone particles made with a reciprocating blade-type bone mill contained larger particles with a broader size distribution than those made by a rotating drum-type bone mill and had higher stiffness on compression testing. The stiffness on torsional testing decreased as the degree of proximal-medial segmental deficiencies increased. The stiffness and maximum torque in a stem with a rectangular cross section and wide anteroposterior surface were higher in torsional tests. Adding hydroxyapatite granules to the bone particles increased the torsional stability. To facilitate compact bone particles, we developed a spacer between the guidewire and modified femoral packers. This spacer facilitated compacting bone particles from the middle up to the proximal and the technique increased the amount of impacted bone particles at the middle of the stem and also improved the initial stability of the stem. Stem design and degree of deficiencies influenced stiffness in the torsional test and the addition of hydroxyapatite granules enhanced torsional stiffness.