Interactions between cancer-associated fibroblasts and tumor cells promote MCL-1 dependency in estrogen receptor-positive breast cancers

Selective inhibition of BCL-2 is expected to enhance therapeutic vulnerability in luminal estrogen receptor-positive breast cancers. We show here that the BCL-2 dependency of luminal tumor cells is nevertheless mitigated by breast cancer-associated fibroblasts (bCAFs) in a manner that defines MCL-1 as another critical therapeutic target. bCAFs favor MCL-1 expression and apoptotic resistance in luminal cancer cells in a IL-6 dependent manner while their own, robust, survival also relies on MCL-1. Studies based on ex vivo cultures of human luminal breast cancer tissues further argue that the contribution of stroma-derived signals to MCL-1 expression shapes BCL-2 dependency. Thus, MCL-1 inhibitors are beneficial for targeted apoptosis of breast tumor ecosystems, even in a subtype where MCL-1 dependency is not intrinsically driven by oncogenic pathways.

Pelvic endometriosis in women under 25: a specific management?

AIM

The aim of this study was to describe the characteristics of women under 25 years with pelvic endometriosis and assess their potential for recurrence and fertility after surgery.

METHODS

In a comparative retrospective study, 108 patients aged less than 25 years who underwent surgery for pelvic endometriosis were included: 49 in the DIE group (deep infiltrating endometriosis) and 59 in the SE group (superficial endometriosis). The main outcome measures were complications, recurrence and fertility. This study received the favorable opinion of the CEROG No 2012-GYN-04-02.

RESULTS

The diagnosis was made at 21.6 ± 2.8 years, mainly considering clinical signs (78.4%), and on average 4.3 ± 3.7 years after the onset of symptoms; 16.1% of patients had to be reoperated (N.=5/31) due to a recurrence of their endometriosis. There were more recurrent pain (50% vs. 21.7%, P=0.005) and endometriosis (35.7 vs. 19.6%, P=0.08) in the DIE group. 75% (N.=33/44) patients desired pregnancy after surgery and 50% of them became pregnant, with one third thanks to assisted reproductive technology.

CONCLUSION

In young women, endometriosis is often more severe. The early treatment does not improve the rate of recurrence and fertility, but can reduce pain and thus improve the quality of life.

How to improve the preoperative staging of presumed early-stage endometrioid endometrial cancer?

PURPOSE OF INVESTIGATION

Accurate preoperative staging of early-stage endometrioid endometrial cancer (EEC) is necessary to avoid under or over surgical treatment. The objective is to determine the rate of understaging and to evaluate the accuracy of different methods: hysteroscopy-curettage versus endometrial biopsy in predicting the final stage.

MATERIALS AND METHODS

This retrospective single-centre study led from 2000 to 2010, included women with EEC preoperatively assessed at low- or intermediate-risk. Understaging was defined as a postoperative FIGO Stage > 1 or a determination of high risk after the final histopathologic diagnosis.

RESULTS

The study included 101 women (75 low-risk and 26 intermediate-risk). Final diagnosis was upstaged for 26 of them, more frequently in the presumed intermediate-risk group (57.7% vs 14.7%, p < 0.001). The rate of preoperative understaging was higher in the women with endometrial biopsies than those with curettage (34.5% vs 15.2%, p = 0.04).

CONCLUSIONS

Hysteroscopy-curettage combined with magnetic resonance imaging (MRI) may improve preoperative staging of early-stage EEC, especially for presumed intermediate-risk disease.

Value of dynamic contrast-enhanced MRI for tissue characterization of ovarian teratomas: correlation with histopathology

AIM

To analyse the value of double contrast-enhanced (DCE) magnetic resonance imaging (MRI) in addition to conventional MRI to characterize ovarian teratomas subtypes with histological correlation.

MATERIALS AND METHODS

From January 2005 to December 2008, 38 women undergoing MRI and subsequent resection of ovarian teratomas were identified [40 mature cystic teratomas (MCT), two struma ovarii, three immature teratomas]. MRI images were analysed blindly by two radiologists according to morphological and vascular abnormalities. An experienced histopathologist reviewed all slides to determine the presence and histological composition of Rokitansky protuberances.

RESULTS

Thirty-one MCT (77%) had at least one small, regular Rokitansky protuberance presenting at an acute angle with the cyst wall. Ten out of 31 MCT did not display any enhancement on contrast-enhanced MRI related to sebaceous glands, adipose lobules, keratin, and pilosebaceous adnexa at histology. Three different time-intensity curve (TIC), types 1, 2, and 3, were related to presence of smooth muscular cells and fibrous, neuroglial, or thyroid tissue, respectively, found at histology of MCT. Type 3 TIC was also present in one struma ovarii and two immature teratomas.

CONCLUSION

TIC types are related to the specific content of the solid tissue of ovarian teratomas but cannot be used to differentiate benign and malignant ovarian teratomas.

Post-traumatic fibro-osseous lesion of the ribs: a relatively under-recognised entity

AIM

To report the description of a rare benign osseous lesion affecting the ribs entitled post-traumatic fibro-osseous lesion (PTFOL).

METHODS

Seven cases of PTFOLs were retrieved from the archives of the University Hospital of Lille. Histological slides were reviewed and lesions were classified according to the histological patterns described by McDermott et al. Clinical and follow-up data were obtained from the patients' charts.

RESULTS

PTFOLs occurred principally in men (mean age 31.8 years) with a known or suspected previous chest injury for four of them. No previous cancer was noted. Radiologically, PTFOLs readily presented as an isolated expansive lucency with a sclerotic rim located on the last five ribs. A constant increased uptake of radionucleotide was noted on bone scan. Microscopically, two fibro-osseous, four xanthomatous and one mixed pattern were individualised. Lesions were characterised by a network of anastomosing bone trabeculae without osteoblast lining within a fibrous stroma. A zonal maturation from woven to peripheral lamellar bone was characterised. Central sheets of lipid-laden histiocytes were conspicuous in the xanthomatous type. For each patient, clinical follow-up was excellent, without any recurrence.

CONCLUSIONS

This is the second largest series of PTFOLs, which is considered to be a dysplastic healing process after trauma. It may be symptomatic or shown by imaging studies realised for unrelated reason. PTFOL is regularly misdiagnosed with other more common lesions of the ribs, such as fibro-osseous dysplasia, osteoma osteoid and benign fibrous histiocytoma. Its recognition is of importance because no follow-up is needed after resection.