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Biomedical subjects

M Fukunaga

Publications and source records attributed to M Fukunaga.

At least 19 recordsLinked to original sources
PubMed2006

Spindle cell carcinoma arising in the pharynx, with granulocytosis and high serum granulocyte colony stimulating factor titre.

We report the case of a 67-year-old man with a left pharyngeal tumour, whose peripheral blood showed granulocytosis (white blood cell count, 58,300/microl) and a high serum granulocyte colony stimulating factor titre (184 pg/ml). The tumour showed pleomorphic proliferation of atypical spindle cells in a myxomatous stroma, revealing a sarcomatous pattern. The spindle-shaped neoplastic cells had irregularly shaped nuclei, a thick nuclear membrane, prominent eosinophilic nucleoli and abundant cytoplasm. They strongly expressed wide-spectrum keratin, cytokeratins (CAM5.2, MNF116), vimentin and vascular endothelial growth factor. A few neoplastic cells expressed granulocyte colony stimulating factor. A spindle cell carcinoma was diagnosed. This may be the first documented case of a granulocyte colony stimulating factor producing cancer arising in the pharynx. The patient died four months after the initial symptoms appeared.

Aged↗
PubMed2005

Heel bone ultrasound predicts non-spine fracture in Japanese men and women.

A number of prospective studies in the USA and Europe have demonstrated that quantitative ultrasound (QUS) measurements predict fracture risk. To our knowledge, there has been no such study in a Japanese population, and very few studies have measured the prognostic value of QUS measurements among men, even in the USA and Europe. We performed a three-center prospective study to investigate the relationship between baseline heel QUS measurements and non-spine fracture risk. There were 4,028 subjects (1,004 men and 3,024 women), 67.5+/-8.9 years [mean +/- standard deviation (SD)] of age), who underwent heel QUS (Achilles device) at three centers between 1993 and 2000. In 2002, the subjects were mailed a standardized questionnaire that asked about their history of fracture. The mean follow-up period was approximately 5 years. The Achilles measured speed of sound (SOS) and broadband ultrasound attenuation (BUA). We used Cox regression analysis to determine the hazard ratio (HR), using weighted coefficients. SOS, BUA, and stiffness index (SI) predicted self-reported hip, wrist, and total non-spine fractures. After we had adjusted for age, gender, and weight, the HRs of total non-spine fracture were 1.54 [95% confidence interval (CI) 1.39-1.69], 1.53 (1.37-1.70), and 1.80 (1.62-1.98) for 1 SD decrease in SOS, BUA, and SI, respectively. In men, SOS and SI also predicted total non-spine fractures with HRs similar to those in women. The HR of prediction for hip fracture by SOS and SI was better in the short term than in the long term, and the prediction for hip, wrist, and non-spine fracture remained significant between 5 to 10 years of follow-up. Measurements obtained from heel QUS predicted non-spine fracture in Japanese men and women, and the HRs of Japanese of both genders was similar to the risk ratio (RR) of Caucasian men and women. QUS parameters can predict hip, wrist, and non-spine fracture up to 10 years.

Adult↗
PubMed2005

Expression of D2-40 in lymphatic endothelium of normal tissues and in vascular tumours.

AIMS: To evaluate the expression of D2-40 in normal lymphatic endothelium and vascular tumours or tumour-like lesions of the skin and soft tissue. D2-40 is a novel monoclonal antibody to a Mr 40 000 O-linked sialoglycoprotein that reacts with a fixation-resistant epitope in lymphatic endothelium. METHODS AND RESULTS: Formalin-fixed paraffin-embedded sections from 30 normal tissue samples, including skin, soft tissue, stomach, and colon, and 84 vascular tumours or vascular tumour-like lesions were immunostained with monoclonal antibodies to D2-40 and CD31. Normal lymphatic endothelial cells in all normal tissues expressed D2-40. Its positive staining delineated flattened channels or open spaces lined by a single layer of endothelial cells whose lumena were sometimes filled with lymphocytes. Ten of 10 cases of lymphangioma, nine of 10 Kaposi's sarcomas (KSs), one of five spindle cell haemangiomas, one of one reactive angioenodotheliomatosis, one of one vascular transformation of lymph node sinuses, three of three Dabska tumours, one of 10 epithelioid haemangioendotheliomas (HEs) and seven of 15 angiosarcomas were positive for D2-40. Positively staining angiosarcomas were characterized by epithelioid or papillary endothelial cells. Twenty-two non-spindle cell haemangiomas, one retiform HE and one Kaposiform HE, and five glomus tumours were negative for D2-40. In comparison, CD31 was expressed in five of 10 lymphangiomas, nine of 10 KSs, 27 of 27 haemangiomas, three of three Dabska tumours, 10 of 10 epithelioid HEs, 15 of 15 angiosarcomas and one of one each of retiform HE, Kaposiform HE, reactive angioendotheliomatosis, and vascular transformation of node sinuses. Five glomus tumours were negative for CD31. CONCLUSIONS: The monoclonal antibody D2-40 is a highly sensitive and specific marker of lymphatic endothelium in normal tissue and a subset of vascular lesions, including KS, Dabska tumour, and lymphangioma. The findings support the concept that these tumours show at least partial lymphatic endothelial differentiation. Subsets of angiosarcomas and HEs show both vascular and lymphatic endothelial differentiation. D2-40 can be used in a panel of markers to classify vascular tumours. There is no requirement for epitope retrieval. This novel monoclonal antibody also has the potential for increasing the accuracy of detection of lymphatic invasion in primary tumours and could be widely applied for this purpose in surgical pathology.

Antibodies, Monoclonal↗
PubMed2004

The mitochondrial genomes of soft ticks have an arrangement of genes that has remained unchanged for over 400 million years.

There are two major groups of ticks: soft ticks and hard ticks. The hard ticks comprise the prostriate ticks and the metastriate ticks. The mitochondrial (mt) genomes of one species of prostriate tick and two species of metastriate ticks had been sequenced prior to our study. The prostriate tick has the ancestral arrangement of mt genes of arthropods, whereas the two metastriate ticks have rearrangements of eight genes and duplicate control regions. However, the arrangement of genes in the mt genomes of soft ticks had not been studied. We sequenced the mt genomes of two species of soft ticks, Carios capensis and Ornithodoros moubata, and a metastriate tick, Haemaphysalis flava. We found that the soft ticks have the ancestral arrangement of mt genes of arthropods, whereas the metastriate tick, H. flava, shares the rearrangements of mt genes and duplicate control regions with the other two metastriate ticks that have previously been studied. Our study indicates that gene rearrangements and duplicate control regions in mt genomes occurred once in the most recent common ancestor of metastriate ticks, whereas the ancestral arrangement of arthropods has remained unchanged for over 400 million years in the lineages leading to the soft ticks and the prostriate ticks.

Animals↗
PubMed2003

Effect of raloxifene on bone mineral density and biochemical markers of bone turnover in Japanese postmenopausal women with osteoporosis: results from a randomized placebo-controlled trial.

The safety and efficacy of raloxifene, a selective estrogen receptor modulator (SERM), has been studied extensively in large, global clinical trials. However, the effect of raloxifene on bone mineral density (BMD) and on biochemical markers of bone turnover in Japanese postmenopausal women with osteoporosis has not been rigorously evaluated. This study was designed to assess the safety and efficacy of raloxifene in Japanese postmenopausal women with osteoporosis following 1 year of therapy. Participants in this multicenter trial were randomly assigned to receive placebo, raloxifene 60 mg/day (RLX60), or raloxifene 120 mg/day (RLX120). Lumbar spine BMD was measured at baseline, 24, 40, and 52 weeks, and biochemical markers of bone turnover were assessed at baseline, 12, 24, and 52 weeks. Serum lipids were assessed at baseline, 12, 24, 40, and 52 weeks, and breast examinations and transvaginal ultrasound of the endometrium were performed at enrollment and 52 weeks. Compared with baseline, women taking RLX60 had significant increases in lumbar spine (L2-L4) BMD at 24 weeks (+3.3%, p<0.001) through 52 weeks (+3.5%, p<0.001) of therapy, and similar results were observed in the RLX120 group. Markers of bone turnover and total cholesterol and LDL-C were significantly reduced, and no significant treatment-group difference was observed for patients reporting at least one adverse event following randomization. In addition, there were no reported venous thromboembolic events (VTE) in any treatment group. The results of this study demonstrate that raloxifene is associated with early increases in lumbar spine BMD, has favorable effects on biochemical markers of bone turnover and lipid profile, and is well tolerated in postmenopausal Japanese women.

Aged↗
PubMed2003

UV-induced skin damage.

Solar radiation induces acute and chronic reactions in human and animal skin. Chronic repeated exposures are the primary cause of benign and malignant skin tumors, including malignant melanoma. Among types of solar radiation, ultraviolet B (290-320 nm) radiation is highly mutagenic and carcinogenic in animal experiments compared to ultraviolet A (320-400 nm) radiation. Epidemiological studies suggest that solar UV radiation is responsible for skin tumor development via gene mutations and immunosuppression, and possibly for photoaging. In this review, recent understanding of DNA damage caused by direct UV radiation and by indirect stress via reactive oxygen species (ROS) and DNA repair mechanisms, particularly nucleotide excision repair of human cells, are discussed. In addition, mutations induced by solar UV radiation in p53, ras and patched genes of non-melanoma skin cancer cells, and the role of ROS as both a promoter in UV-carcinogenesis and an inducer of UV-apoptosis, are described based primarily on the findings reported during the last decade. Furthermore, the effect of UV on immunological reaction in the skin is discussed. Finally, possible prevention of UV-induced skin cancer by feeding or topical use of antioxidants, such as polyphenols, vitamin C, and vitamin E, is discussed.

Animals↗
PubMed2003

A double-blind dose-ranging study of risedronate in Japanese patients with osteoporosis (a study by the Risedronate Late Phase II Research Group).

To determine the clinical recommended dosage regimen of risedronate for the treatment of involutional osteoporosis in Japanese patients, dose-response relationships for the efficacy and safety of this drug were investigated using a multi-center, randomized, double-blind, parallel group comparative design with four dose levels of risedronate (placebo, 1 mg, 2.5 mg and 5 mg per day). A total of 211 patients diagnosed with involutional osteoporosis according to the criteria proposed by the Japanese Society for Bone and Mineral Research were randomized and received one of the four doses once daily for 36 weeks. All patients were supplemented with 200 mg of calcium daily in the form of calcium lactate. The primary efficacy endpoint was the percent change in bone mineral density of the lumbar spine (L2-L4 BMD) determined by dual-energy X-ray absorptiometry (DXA) from baseline to the time of final evaluation. Changes in biochemical markers of bone turnover and safety profile were also compared. Percent changes in L2-L4 BMD at final evaluation in the placebo, and 1-, 2.5-, and 5-mg risedronate groups were 0.79+/-5.30, 2.71+/-4.93, 5.29+/-3.96, and 5.15+/-4.25% (mean+/-SD), respectively. A linear dose-response relationship was obtained up to a dose of 2.5 mg, whereas no further increase in BMD was observed at 5 mg. The decrease in bone turnover markers, including N-terminal osteocalcin, phosphorus, and urinary deoxypyridinoline, also showed a linear dose-response relationship up to a dose of 2.5 mg. Alkaline phosphatase level decreased linearly up to a dose of 5 mg. Risedronate was well tolerated in this 36-week study with 1- to 5-mg doses. Neither the overall incidence of adverse events nor the percentage of patients without problem in overall safety assessment differed significantly among the dose groups including the placebo group. Based on these results, a once-daily dose of 2.5 mg of risedronate, which is half that used in Caucasians, is recommended for the treatment of involutional osteoporosis in Japanese patients.

Alkaline Phosphatase↗
PubMed2003

Effects of endurance exercise on three-dimensional trabecular bone microarchitecture in young growing rats.

Appropriate endurance exercise is capable of increasing bone mass and strength in both animals and humans. We examined the skeletal changes induced by treadmill running exercise in young growing rats with a particular emphasis on three-dimensional trabecular bone microarchitecture. Fourteen male Wistar rats were divided into sedentary (CON; n = 7) and exercised (RUN; n = 7) groups at the age of 4 weeks. The rats in the RUN group performed the treadmill running exercise of 30 m/min for 60 min, 5 times a week. After 10 weeks of exercise, bone mineral density (BMD), cortical geometry, diaphyseal breaking force, and trabecular bone microarchitecture in the femur were measured. Three-dimensional trabecular bone microarchitecture was evaluated at the distal femoral metaphysis using microcomputed tomography. The running exercise significantly increased BMD, bone volume, bone volume fraction, trabecular thickness, and trabecular number, whereas trabecular bone pattern factor, the parameter associated with decreased trabecular connectivity, was significantly lower in the RUN group than the CON group. On the other hand, no significant difference in the degree of anisotropy and structure model index was observed between the two groups. At the femoral diaphysis, running exercise significantly increased cortical bone area, width, and maximum load without affecting bending stress, implying that the material properties of bone had not changed in the exercised rats. These results suggest that the increase in bone strength induced by endurance exercise is mediated by changes in trabecular bone microarchitecture as well as density and cortical geometry.

Animals↗
PubMed2003

Amended biochemical characteristics and phylogenetic position of Treponema medium.

Umemoto et al. (1997, Int J Syst Bacteriol 47, pp. 67-72) proposed spirochete strain G7201, isolated from the periodontal pocket of an adult patient, as a new species, Treponema medium. They deposited this strain in the American Type Culture Collection (ATCC) as type strain ATCC 700293T. Recently, ATCC suggested that there is a discrepancy between the previous report and the results obtained by ATCC in biochemical tests on T. medium ATCC 700293T. In this study, we re-examined and verified the biochemical characteristics of T. medium. The fermentation pattern of carbohydrates of T. medium resembled that of Treponema vincentii and Treponema denticola, but T. medium was clearly differentiated from T. vincentii in the production of indole, and from T. denticola in the hydrolysis of esculin. Also, sodium dodecylsulfate-polyacrylamide gel electrophoresis (SDS-PAGE) protein profile analysis and phylogenetic comparison of 16S rDNA sequences revealed that T. medium is clearly differentiated from any established treponemal species, which supports the validity of the proposal of Treponema medium as a new species.

Bacterial Proteins↗
PubMed2003

Detection of cardiovascular risk factors by indices of obesity obtained from anthropometry and dual-energy X-ray absorptiometry in Japanese individuals.

OBJECTIVE: To determine the cut-off points of indices of obesity for detecting hypertension, dyslipidemia and diabetes mellitus in Japanese individuals. DESIGN: Cross-sectional study. SUBJECTS: A total of 2728 Japanese individuals (768 males and 1960 females, aged 20-79 y) who attended the Fukuoka Health Promotion Center, Japan for health check-up. MEASUREMENTS: Body mass index (BMI), waist circumference (WC) and waist-hip ratio (WHR) were measured. Percentage fat mass (%FM), trunk fat mass (FM(trunk)) and trunk fat mass-leg fat mass ratio (FM(trunk)/FM(legs)) were obtained by dual-energy X-ray absorptiometry (DXA). Cardiovascular risk factors were determined by blood pressure, serum lipids, fasting blood glucose and hemoglobin A(1C). RESULTS: The cut-off points of BMI, WC and WHR were around 23.5 kg/m(2), 84 cm and 0.9 for males, and 22.5 kg/m(2), 72 cm and 0.8 for females. The cut-off points of %FM, FM(trunk) and FM(trunk)/FM(legs) were around 24%, 8 kg and 1.6 for males, and 35%, 9 kg and 1.4 for females. WHR and FM(trunk)/FM(legs) most accurately detected the risk factors. CONCLUSIONS: For Japanese individuals, the cut-off points for detecting cardiovascular risk factors are lower than the criteria by the World Health Organization. Indices of fat distribution detected the cardiovascular risk factors more accurately than those of overall adiposity. The accuracy of detecting the risk factors was comparable between the anthropometric indices and indices obtained by DXA.

Absorptiometry, Photon↗
PubMed2003

Antithrombin modulates the leukocyte-endothelial cell interaction in the staphylococcal enterotoxin B-challenged mouse.

BACKGROUND: The beneficial effects of antithrombin on endotoxemia are well known. The purpose of this study was to examine the effects of antithrombin in a supertoxin-induced sepsis. METHODS: Mice were injected with staphylococcal enterotoxin B simultaneously with antithrombin. At 1 hour after injection, the mesenteric microcirculation was observed under intravital microscopy. In addition, humoral mediators were measured at the same time. RESULTS: The number of rolling leukocytes on the endothelium was significantly reduced in the treated mice (p < 0.01). The decrease of white blood cell and platelet counts was significantly inhibited in the treated animals (p < 0.01 for both). A comparison of the intercellular adhesion molecule-1 (p < 0.05), soluble tumor necrosis factor-alpha receptor (p < 0.05), and interleukin-6 (p < 0.01) levels showed less increase in the treated mice. CONCLUSION: Antithrombin showed a protective effects on the microcirculation of staphylococcal enterotoxin B-challenged mice by attenuating leukocyte-endothelial cell interaction. Suppression of adhesive molecule expression and cytokine production appears to play roles in this effect.

Animals↗
PubMed2003

Mitochondrial sequence variation in Carlos capensis (Neumann), a parasite of seabirds, collected on Torishima Island in Japan.

Partial mitochondrial 16S ribosomal ribonucleic acid gene sequences in the ticks Carios capensis collected from black-footed albatross. Diomedea nigripes, colonies on Torishima Island, Japan (30 degrees 28'N, 140 degrees 18'E), were examined. The sequence was compared with those of C. capensis from Hawaii, South Carolina, and Texas. The sequences were all identical in ticks from Torishima and 2 from Hawaii. There were 2-3 transitions between the other Hawaiian and Texas ticks and Torishima specimens. Two transitions were also observed when compared with the ticks from South Carolina. The results suggest the possibility of gene flow between tick populations at each of the 2 geographic sites, which probably was accomplished by tick-infested migratory seabirds at their breeding sites. Sequence comparison analysis indicated that the C. capensis ticks are on the branch with C. marginatus and C. mexicanus ticks and not with Ornithodoros. This supports the revision suggested by Klompen and Oliver (1993).

Animals↗
PubMed2003

Long-term evaluation of nutritional status using dual-energy X-ray absorptiometry in chronic hemodialysis patients.

BACKGROUND: Hemodialysis patients very often suffer from malnutrition with net loss of body muscle and fat stores. Since protein-calorie malnutrition has been considered to be highly associated with increased morbidity and mortality, it is important that the nutritional status is evaluated accurately and that long-term evaluation of the nutritional status is performed to obtain good outcome. PATIENTS AND METHODS: Forty-six patients (28 men and 18 women) undergoing maintenance hemodialysis were studied. Nutritional status of the patients was examined by dual-energy X-ray absorptiometry (DXA) and anthropometry measurements after a hemodialysis session and 4 years after the initial measurement. RESULTS: Percent fat, the ratio of body fat (BF) to weight, determined by DXA correlated positively with body mass index (BMI) calculated from weight and height. There was also a significant positive correlation between lean body mass (LBM) determined by DXA and arm muscle circumference (AMC) calculated using the anthropometric method. In the study period of 4 years, LBM and bone mineral content (BMC) observed at the end point were significantly lower than those at the start. In contrast, BF and %fat at the end point were significantly higher as compared with those at the initial measurement. CONCLUSION: These results indicate that DXA is a reliable method for body composition analysis in chronic hemodialysis patients. Because the detection of early alterations in body composition may provide an early indication of the development of malnutrition, serial evaluation of body composition using DXA should be valid for assessment of the nutritional status.

Absorptiometry, Photon↗
PubMed2002

A comparison of the effect of risedronate and etidronate on lumbar bone mineral density in Japanese patients with osteoporosis: a randomized controlled trial.

To demonstrate the clinical benefit of 2.5 mg daily risedronate in the treatment of involutional osteoporosis, the effect of risedronate on bone mineral density (BMD) of the lumbar spine was compared with that of etidronate, selected as a representative of the bisphosphonates currently marketed in Japan. In this multicenter, randomized, double-masked, active (etidronate) controlled comparative study, a total of 235 Japanese patients with involutional osteoporosis were randomized to receive either treatment with 2.5 mg/day of risedronate for 48 weeks or intermittent treatment with etidronate (4 cycles of 2 weeks of treatment with 200 mg/day followed by 10-week medication-free periods). All patients received 200 mg of calcium supplement daily in the form of the calcium lactate. Bone mineral density of the lumbar spine (L2-L4 BMD) was determined at 12, 24, 36 and 48 weeks by dual-energy X-ray absorptiometry. The primary endpoint was the percent change in L2-L4 BMD from baseline to the time of final evaluation. Changes in biochemical markers of bone turnover and safety profiles were also compared. A significant increase in L2-L4 BMD was observed at 12 weeks after initiation of therapy in both the risedronate (2.8%) and etidronate (1.8%) groups. The increase in L2-L4 BMD at the time of final evaluation in the risedronate group (4.9%) was significantly greater ( p = 0.002) than that in the etidronate group (3.1%). The changes in bone resorption markers (urinary total deoxypyridinoline and N-terminal telopeptide of type I collagen) from baseline to 48 weeks were -37.6% and -41.3% for risedronate and -22.5% and -26.6% for etidronate, respectively. New vertebral fractures or deterioration of existing fractures were observed in 2.8% (3/106) of the patients in the etidronate group, while no such cases (0/101) were observed in the risedronate group. No significant difference in the incidence of adverse events was found between two treatments. Daily oral risedronate (2.5 mg) exhibited efficacy superior to that of intermittent cyclical etidronate (200 mg) in increasing L2-L4 BMD, and was well tolerated by Japanese patients with involutional osteoporosis.

Adult↗
PubMed2002

Localized heat urticaria in a patient is associated with a wealing response to heated autologous serum.

We report a case of localized heat urticaria in a 71-year-old woman who developed weals and loss of consciousness after taking a bath. Exposing her skin to heat at 40 degrees C or immersing her hands in water at 40 degrees C produced urticarial lesions and increased her plasma histamine level. Desensitization with hot water improved her symptoms and normalized her plasma histamine level after heat challenge. An intracutaneous injection of her serum produced no reaction, while an injection of her serum that had been heated at 40 degrees C for 15 min induced a weal flare response. Further examination revealed that the weal-inducing activity of her heated serum remained for at least for 6 h and that treatment of her serum at 60 degrees C for 2 h did not abrogate its weal-inducing activity. These findings indicate that certain materials in her serum that are activated by heat are responsible for the development of her anaphylactic and urticarial reactions and that these reactions may be mediated by histamine.

Aged↗
PubMed2001

UV-induced tyrosine phosphorylation of PKC delta and promotion of apoptosis in the HaCaT cell line.

Protein kinase C delta (PKC delta) is activated through tyrosine phosphorylation and is involved in apoptosis induction in the H(2)O(2)-treated fibroblasts. In the human keratinocyte HaCaT cell line, ultraviolet radiation, which induces apoptosis, promoted tyrosine phosphorylation and activation of PKC delta, but neither enhanced threonine phosphorylation in the activation loop nor generated the catalytic fragment of the PKC isoform. Tyrosine phosphorylation of PKC delta was prevented by a radical scavenger, N-acetyl-l-cysteine, and by a tyrosine kinase inhibitor, genistein, in the ultraviolet-irradiated keratinocyte cell line. Ultraviolet radiation-induced apoptosis was attenuated by N-acetyl-l-cysteine and genistein as well as by a PKC inhibitor, bisindolylmaleimide I. These results indicate that reactive oxygen species generated by ultraviolet radiation enhance tyrosine phosphorylation of PKC delta, and the PKC isoform thus activated by the modification reaction contributes to induction of apoptotic cell death in keratinocytes.

Antineoplastic Agents↗
PubMed2001

Conservative therapy for adenocarcinoma and atypical endometrial hyperplasia of the endometrium in young women: central pathologic review and treatment outcome.

Thirty-nine patients with endometrioid adenocarcinoma (EA) and atypical hyperplasia (AH) of the endometrium who received conservative treatment to preserve fertility were collected from member institutions of the Japan Gynecologic Oncology Study Group. Twenty-nine and ten were originally diagnosed with EA without myometrial invasion and AH, respectively. We performed a central pathological review to make definite diagnoses, and the diagnosis of EA in 29 cases was changed to AH in ten, complex hyperplasia in three and atypical polypoid adenomyoma in three, and AH in ten was changed to EA in one and simple hyperplasia in one. Nine of 12 women (75%) with EA and 15 of 18 women (83%) with AH had an initial response to medroxyprogesterone acetate (MPA) treatment. Two of nine responders with EA later developed relapse, and one of them had metastasis to the left obturator lymph node. Two became pregnant, and one delivered one full-term infant. One of the responders with AH had a relapse in the endometrium. Five became pregnant, and four delivered four normal infants. The young women with endometrial carcinoma localized in the endometrium who wish to preserve fertility may be treated as successfully with MPA as those with AH.

Adenocarcinoma↗