Primary Diffuse Large B-Cell Lymphoma of the Rectosigmoid Colon in a Patient With Ulcerative Colitis Who Never Received Immunosuppression.

Primary rectal lymphoma is extremely rare, accounting for approximately 0.05% of all primary rectal neoplasms. We present a patient with long-standing ulcerative colitis, who was never treated with immunomodulators or biologic agents, diagnosed with primary diffuse large B-cell lymphoma of the rectosigmoid colon, and achieved remission after chemotherapy.

Epidermolysis bullosa acquisita: an uncommon cause of esophageal stricture.

Epidermolysis bullosa acquisita (EBA) encompasses a wide spectrum of rare diseases with a common genetic origin transmitted in an autosomal recessive fashion. Mild forms of non-inflammatory EBA are characterized by skin lesions and have gained great relevance in the literature. However, resistant inflammatory EBA with widespread mucosal involvement remains a rare entity given its low prevalence.

Reevaluating the Utility of Maxillary Sinus Opacification as a Screening Tool for Facial Bone Fracture a Decade After Its Original Analysis.

In 1997, Lambert and colleagues demonstrated that the absence of sinus fluid on head CT essentially excludes a fracture involving the sinus walls. Our purpose is to reevaluate this association utilizing the current standard of imaging technology. With improved image resolution, we aim to reassess whether the sensitivity and specificity of the "clear sinus sign" are improved or worsened.

Cephalosporin-Induced Toxic Epidermal Necrolysis Treated with Intravenous Immunoglobulin.

Toxic epidermal necrolysis (TEN) is a life-threatening cutaneous reaction to various medications, including antipsychotics and antibiotics. While cephalosporin-induced TEN is very rare, we present a case of cefepime-induced TEN. There are several commonly used therapies for TEN, including immunosuppressive agents and intravenous immunoglobulin (IVIG), but their true efficacy has not been proven.

An Unusual MRI Appearance of Osseous Metastases.

Bone metastases can present in a wide variety of appearances across all imaging modalities. We present a unique appearance of a distal femoral metastasis in a patient who initially complained of knee pain. The radiographic and CT findings were initially suspicious for calcium pyrophosphate deposition (CPPD) arthropathy; however, an MRI demonstrated multiple lesions with a lamellated appearance confirmed on biopsy to be metastatic disease.

Elizabethkingia meningosepticum in a Patient with Six-Year Bilateral Perma-Catheters.

Elizabethkingia meningosepticum (EM) is a saprophyte which is ubiquitous in nature, but not normally present in the human flora. Instances of infection are rare in the USA, but EM may be an emerging pathogen among immune-compromised patients. EM can cause a variety of infections, but nosocomial pneumonia and bacteremia have been the most commonly reported among immune-compromised adults.