Myeloid sarcomas of the head and neck in pediatric patients with myeloid leukemia.

Myeloid sarcoma is a rare extramedullary tumor composed of malignant myeloid cells that occur in the presence of myeloid leukemia. We report a case series of pediatric head and neck myeloid sarcomas representative of the epidemiology, symptomatology, laboratorial correlations, prognoses, and treatment of extramedullary leukemia. Presented are 3 cases involving patients ranging from 17 months to 11 years of age.

Minor salivary gland basal cell adenocarcinoma: a systematic review and report of a new case.

Importance: Basal cell adenocarcinoma (BCAC) of the minor salivary gland is an extremely rare disease: the most recent substantive literature review reports only 25 cases. Owing to the rarity of this disease, it has not yet been well characterized in the literature.

Objective: We sought to expand the knowledge of minor salivary gland BCAC by performing an exhaustive literature review and adding to it a new case that is rare owing to the tumor's size, aggressive nature, and mixed histologic pattern.

A cooperative approach to diagnosis of rare diseases: primitive myxoid mesenchymal tumor of infancy.

Primitive Myxoid Mesenchymal Tumor of Infancy (PMMTI) is a recently recognized locally aggressive myofibroblastic tumor. It is a low- to intermediate-grade fibroblastic malignancy with a high local recurrence rate but low metastatic potential and is composed of primitive spindled cells in a myxoid background. We present the eleventh reported case of PMMTI, occurring in the sinonasal tract of a 3-year old child.

Balance as a measurement of fatigue in postcall residents.

Objectives/hypothesis: To determine the degree to which balance is impaired by fatigue in postcall medical residents and to assess the validity of posturography in quantifying that impairment.

Study Design: Prospective study.

Methods: Medical residents underwent the following tests before and immediately after overnight call: 1) computerized dynamic posturography (CDP) using the Equitest force platform (Natus Medical Inc.