High-Grade Sinonasal Small Cell Neuroendocrine Carcinoma in a Patient With Xeroderma Pigmentosum: A Case Report.

Neuroendocrine tumors are rare and highly heterogeneous neoplasms with a wide spectrum of histological differentiation, functional, and biological features. Small cell neuroendocrine carcinomas (SNECs) of the sinonasal tract are particularly rare. Pathological features of SNECs of the nasal cavity and paranasal sinuses, which are aggressive tumors, are similar to those of anaplastic small cell carcinomas of the lung.

A molecular study of pediatric pilomyxoid and pilocytic astrocytomas: Genome-wide copy number screening, retrospective analysis of clinicopathological features and long-term clinical outcome.

Background: Pilocytic Astrocytoma (PA) is the most common pediatric brain tumors. PAs are slow-growing tumors with high survival rates. However, a distinct subgroup of tumors defined as pilomyxoid astrocytoma (PMA) presents unique histological characteristics and have more aggressive clinical course.

The Youngest Case of Metachronous Bilateral Acinic Cell Carcinoma of the Parotid Gland: A Case Report and Literature Review.

Introduction: Acinic cell carcinoma (ACC) is a low-grade malignant salivary neoplasm that represents 17% of all salivary gland malignancies. It has a tendency to affect young individuals, especially females. ACC mainly originates in the parotid gland and has a potential for recurrence and metastases.

Invasive fungal infection of the brain caused by in a post-renal transplant patient: A case report.

Neoscytalidium is a phytopathogen that is often found in plants and soil. It mostly leads to skin and nail infections, and invasive diseases of the sinuses, lung, and brain have been described mostly in immunocompromised patients. We report a case of a post-renal transplant patient who received anti-thymocyte globulin for induction immunosuppression.

Unilateral Exserohilum Allergic Fungal Sinusitis in a Pediatric Host: Case Report.

Introduction: Allergic fungal sinusitis (AFS) is a result of an inflammatory reaction to fungi in the nasal and paranasal sinuses. Although the causative agents of AFS vary, Exserohilum species are among the rare ones, as only a few cases have ever been reported a few times in the literature. The objective of this report is to highlight this unusual fungal type causing unilateral AFS in Saudi Arabia.

A missed fragmented double J ureteral stent for two years: Case report.

Inserting Double-j ureteral stent is one of the most popular procedures in urology field. There are different indications for indwelling the stent. For some reasons, it could be neglected for a long time despite its importance.

Ganglioneuroma of the External Auditory Canal and Middle Ear.

Objective: We report an extremely rare case of ganglioneuroma involving the external auditory canal and middle ear.

Case Report: Ganglioneuromas are rare benign mature tumors thought to originate from sympathetic ganglions, with the highest incidence in the retroperitoneum, adrenal medulla, and posterior mediastinum. We present a case of ganglioneuroma of the external auditory canal and middle ear.

Etiology of optic atrophy: a prospective observational study from Saudi Arabia.

Background: Optic atrophy (OA) represents permanent retinal ganglion cell loss warranting study to establish etiology.

Objectives: To describe neurogenic causes of OA.

Design: Prospective, observational.

Novel mutation in DOCK8-HIES with severe phenotype and successful transplantation.

Background: Hyper-IgE syndrome (HIES) due to DOCK8 deficiency is an autosomal recessive (AR) primary combined immunodeficiency which results in significant morbidity and mortality at a young age. Different mutations in the DOCK8 gene can lead to variable severity of the disease.

Objective: We evaluated the genetic mutations in three related patients with severe clinical manifestations suggestive of AR HIES.

Hepatocellular carcinoma first presenting as a tumor of the oral cavity.

Hepatocellular carcinoma (HCC) is the sixth most common neoplasm worldwide; HCC metastasis is common affecting 50% of cases. However, metastasis to the oral cavity is extremely infrequent. We present a case of hepatocellular cancer first presenting as a mass lesion at the upper alveolus and review metastatic hepatocellular carcinoma to the oral cavity in 73-year-old male patient.

Fibromatosis arising in association with neuromuscular hamartoma of the mandible.

Aggressive fibromatosis is a benign but locally-aggressive tumor, which most often affects the muscles of the shoulder, the pelvic girdle, and the thigh. It usually affects adolescents and young adults. Desmoplastic fibroma, considered the bone counterpart of soft tissue fibromatosis, is a rare tumor that usually affects the metaphyseal or diaphyseal portions of long bones or, less commonly, the jaw.