Goblet cell tumors of the appendix: A review.

Goblet cell tumors are rare tumors of the appendix that exhibit both neuroendocrine and mucinous differentiation. This dual differentiation has led to a controversy regarding the proper classification of these neoplasms as to whether they should be considered neuroendocrine tumors or adenocarcinomas. Multiple grading systems have been proposed that were able to segregate these tumors into prognostically significant groups. Many of these grading systems rely on identifying and/or quantifying the carcinomatous growth pattern. Goblet cell tumors show patchy and focal expression of neuroendocrine markers and are characterized by a mutational profile that is different from both appendiceal adenocarcinomas and neuroendocrine tumors. They exhibit a more aggressive behavior than neuroendocrine tumors, and as such, many authors recommend that they be approached and treated as adenocarcinomas.

Primary synovial sarcoma of the kidney: a case report of complete pathological response at a Lebanese tertiary care center.

BACKGROUND: Primary synovial sarcoma of the kidney is a rare type of soft tissue sarcoma. Its presenting features can resemble those of other renal tumors; rendering its early diagnosis, a dilemma. Several cases of renal synovial sarcoma have been reported in the literature with varying treatment options and outcomes. This article describes a rare case of primary renal synovial sarcoma and reviews all cases in the literature. CASE PRESENTATION: A 26-year-old male presented with flank pain and hematuria. Initially diagnosed with Wilm's tumor, revision of pathology and histology, along with the immunohistochemical profile, confirmed, nevertheless, the diagnosis of primary monophasic synovial sarcoma of the kidney with the SYT-SSX2 fusion transcript. Follow-up, post nephrectomy, revealed recurrence within the lungs and at the surgical bed. Surgical resection followed by adjuvant chemotherapy regimen constituting of Doxorubicin and Ifosfamide, achieved complete pathological response. CONCLUSION: In this case report, we emphasize the need for accurate diagnosis and prompt treatment. We propose multimodality treatment approach including surgery along with anthracycline-based chemotherapy to induce complete remission.

Florid Cystitis Glandularis with Intestinal Metaplasia in the Prostatic Urethra: a case report and review of the literature.

INTRODUCTION: Cystitis glandularis is a proliferative disease of the bladder epithelium usually presenting in the setting of chronic inflammation, characterized by the formation of glands in the bladder mucosa and submucosa. Intestinal metaplasia is a described process in cystitis glandularis characterized by the presence of intestinal cells and mucin production which is rare as compared to cystitis glandularis. CASE PRESENTATION: We present a case of cystitis glandularis with intestinal metaplasia located in the bladder and concomitantly in the prostatic urethra. Patient underwent transurethral resection of the lesion which was unusually found in the prostatic urethra. CLINICAL DISCUSSION: Florid cystitis glandularis is a rare condition found in women more than in men. It usually presents with irritative lower urinary tract symptoms or hematuria which leads to its eventual diagnosis. It is usually causes by inflammation to the bladder mucosa due to infections or irritation. Patients are diagnosed through Transurethral resection of these bladder lesions found in the trigone and bladder neck region. Surgery is the standard treatment of choice. However, medical treatment may also be used to treat underlying inflammatory conditions using antibiotics, steroids, and non-steroidal anti-inflammatory agents. Radical or partial cystectomy may be performed for severe refractory cases. CONCLUSION: This article describes the rare occurrence of florid cystitis glandularis in the prostatic urethra and provides an overview on diagnosis, etiology, and management of the disease.

Primary alveolar rhabdomyosarcoma of the brain: a case report.

BACKGROUND: Primary brain rhabdomyosarcoma is a rare primary brain malignancy with few case reports. The vast majority of cases of primary brain rhabdomyosarcoma occur in pediatric patients, and immunohistochemistry can distinguish it from embryonal subtypes; however, few cases of primary brain rhabdomyosarcoma in adults have been reported in the literature. CASE PRESENTATION: We report the case of a 26-year-old White male patient who was found to have primary brain alveolar rhabdomyosarcoma after developing headaches for several months. A brain MRI revealed a mixed cystic and solid tumor along the vermis of the cerebellum. The patient underwent a gross total surgical resection, which confirmed the diagnosis of alveolar rhabdomyosarcoma. Further staging workup for another primary focus or disseminated disease yielded negative results, confirming the diagnosis of primary alveolar rhabdomyosarcoma of the brain. CONCLUSION: The standard of care for managing this rare type of brain tumor involves surgery with adjuvant chemoradiotherapy. Further studies should be conducted for a better diagnostic and therapeutic understanding.

Growth of E18 rat hippocampal neuronal cells on nanostructured surfaces for enhanced electrical stimulation and recording.

We have prepared gold nanowire arrays inside nanoporous alumina templates with the goal towards neuronal interfacing and electrical recording from neurons. We have investigated biofunctionalization of such gold nanowire arrays (GNWs) and gold nanofilm (GNF) platforms to understand its impact on neuronal attachment and growth. Poly-D-Lysine (PDL) was coated on the nano-templates surfaces for adhesion of neurons which also enhanced the neuronal growth. Optical microscopy and scanning electron microscopy images revealed strong affinity and improved growth of neurons on PDL-coated surfaces. Such results will impact future investigation of stimulation and recording of electrical activity on nanoscale surfaces.

Radiation-induced angiosarcoma of the vagina and vulva: Case report and review of literature.

Angiosarcomas are uncommon malignant mesenchymal neoplasms of endothelial origin. They may be primary or secondary to radiation exposure, chronic lymphedema or to other associated risk factors. They can occur anywhere in the body, with the most common location being the skin of the head and neck. Radiation-induced angiosarcomas of the gynecologic tract are very rare with only few cases reported in the literature. We report a case of a 54-year-old lady who developed angiosarcoma of the vagina and vulva 9 years following radiotherapy for cervical cancer. She was treated with chemoradiotherapy and died nine months following the diagnosis of angiosarcoma. We also performed a literature review of the radiation-induced angiosarcomas arising in the vagina and vulva. Angiosarcomas should always be considered in the differential diagnosis when dealing with a tumor located in a previously irradiated area, as they may clinically mimic recurrence of the original tumor the patient had.

Spinal intradural extramedullary granular cell tumor.

Background: Granular cell tumors (GCTs) are uncommon peripheral nerve sheath tumors of Schwann cell origin that may occur throughout the body. However, they rarely occur in the spinal canal. Case Description: A 49-year-old male presented with burning sensation in the left knee. The MRI of the lumbar spine showed an L3-L4 intradural extramedullary tumor. Complete surgical resection was successfully performed and the L3 root burning improved. Histopathologically, the lesion proved to be a benign GCT. Conclusion: Spinal GCTs are rare benign tumors that may be found in an intradural extramedullary location in the spine. The preferred treatment is complete surgical resection as subtotal/partial resection may result in recurrence warranting radiation therapy.

Esophageal Cytomegalovirus and Herpes Simplex virus co-infection in an immunocompromised patient: Case report and review of literature.

Herpes simplex virus and Cytomegalovirus co-infection has been reported to occur in a variety of sites in immunocompromised patients. To our knowledge, few cases of such co-infection have been reported to occur in the esophagus. We report a case of a 60-year-old woman who was maintained on immunosuppressive therapy for a presumed diagnosis of pemphigus vulgaris, who presented with odynophagia. Investigations revealed ulcerative esophagitis caused by both HSV and CMV. The patient was treated with valganciclovir with full recovery. We also present the results of various studies on patients with similar presentation particularly those caused by HSV and CMV co-infection.

Human Papillomavirus-Associated Oropharyngeal High-Grade Neuroendocrine Carcinoma in an Adolescent: Case Report and Review of Literature.

Oropharyngeal small cell carcinomas (OPSmCC) are rare with only few case reports and case series published in the literature. More recently, an association of these tumors with human papillomavirus (HPV) infection has been detected. However, unlike oropharyngeal squamous cell carcinomas which have a better outcome when associated with HPV, OPSmCC exhibit an aggressive behavior. In this article, we report a case of tonsillar carcinoma arising in a 14-year-old boy that was associated with HPV infection. The tumor exhibited morphologic features of small cell carcinoma with no overt squamous differentiation. Yet, by immunohistochemistry, it showed diffuse and strong co-expression of both squamous and neuroendocrine markers. In addition, we present the clinicopathologic features of all the cases of OPSmCC reported in the literature for which p16 and/or HPV testing have been done.

Review of Hematopathology Consult Cases: A Two-Year Experience in a Tertiary Referral Center in Lebanon.

Hematopathology remains a difficult diagnostic field. With the significant ongoing changes in the classification system that happened over the past several decades, the general pathologist faces many challenges when dealing with patients suspected to have lymphoma or leukemia. The authors assessed referred hematopathology cases that were reviewed by specialized hematopathologists. Of 309 cases, major discrepancy was found in 23% of them. The discrepancy ranged from lymphoma reclassification to other major revisions that had significant impact on patient treatment and management. This paper highlights some of the challenges that may face the general practicing pathologist when dealing with suspected hematopoietic neoplasms.

Activating BRAF Mutations Detected in Mixed Hürthle Cell Carcinoma and Multifocal Papillary Carcinoma of the Thyroid Gland: Report of an Unusual Case and Review of the Literature.

Despite the increase in the incidence of thyroid carcinomas, the occurrence of collision tumors in the thyroid remains a rare event. We present the case of a 69-year-old female who presented to the emergency department with a chief complaint of painful neck swelling. Imaging revealed a large right hemithyroid mass and a left hemithyroid nodule. Fine needle aspiration of the lesions and subsequent total thyroidectomy revealed a Hürthle cell carcinoma in the right lobe and bilateral multicentric papillary carcinoma foci, including 2 foci with a classical pattern and 1 encapsulated follicular variant in the isthmus. BRAF gene mutation analysis revealed V600E gene mutation in the classical variants of papillary carcinoma and in the Hürthle cell carcinoma. The focus of follicular variant of papillary carcinoma in the isthmus and a sample from normal thyroid tissue did not harbor BRAF mutations. This case is remarkable in being an unusual report of a follicular Hürthle cell carcinoma harboring the BRAF V600E mutation and occurring in collision with multifocal papillary carcinoma. Documentation of such cases is important as it helps better understand the pathogenesis, clinical behavior, and radiologic findings of such rare lesions and to determine the optimal treatment modalities.