Obgyn Key

Herpes simplex virus (HSV) esophagitis occurs primarily in immunocompromised patients, who may have life-threatening disease at the time of diagnosis.2 In immunocompetent patients, the infection is self-limited and resolves spontaneously…

Pediatric CNS tumors are classified according to the World Health Organization (WHO) classification.1,2 The assigned WHO grade describes the biology of the lesion, but a low grade does not always…

Yeasts Differentiating features of yeasts in tissue include size (including size variability), shape of budding, formation of pseudohyphae, and pattern of inflammatory response (eTable 9.2). If only a few organisms…

BIOPSY DIAGNOSIS OF SOFT TISSUE LESIONS Biopsies of soft tissue tumors may be performed in several different ways. These include fine needle aspiration, large-needle core biopsy, open incisional biopsy, and…

Solid pseudopapillary tumor of pancreas (SPN) is a low-grade malignancy with epithelial differentiation, most common in adolescents and young women.4–6 The histopathologic features vary from solid to pseudopapillary to cystic…

Metabolic Disorders of Bone Bone biopsies may be used in the diagnosis of metabolic bone diseases in the pediatric population, such as rickets and renal osteodystrophy. Bone biopsy may also…

Eosinophilic inflammation: Eosinophilic (Löffler) myocarditis is a rare form of myocardial inflammation associated with eosinophilia, which is most commonly idiopathic but can be seen in parasitic infection, hypereosinophilic syndromes, asthmatic…

Papillary duct hyperplasia is an uncommon epithelial proliferation that occurs in adolescents and young women. It presents as a mass lesion and can be associated with nipple discharge. Grossly, multiple…