Arthroscopic Untethering of the Fat Pad of the Knee: Release or Resection of the Infrapatellar Plica (Ligamentum Mucosum) and Related Structures for Anterior Knee Pain.

Anterior knee pain (AKP), a multifactorial symptom complex, can be successfully treated surgically. A specific diagnosis often cannot be made, but the pain is linked to an unrecognized common factor in most patients: the mechanical behavior of the non-isometric contents of the anterior compartment of the knee-the fat pad (FP) and infrapatellar plica (IPP). The objective of this presentation is to describe an effective arthroscopic technique that treats AKP by addressing this common factor.

Evaluation of a new staging classification and a Peritoneal Surface Disease Severity Score (PSDSS) in 229 patients with mucinous appendiceal neoplasms with or without peritoneal dissemination.

Introduction: Most classifications of mucinous appendiceal neoplasms (MAN) do not take into consideration the type of primary tumor or the burden of peritoneal disease.

Materials And Methods: We conducted a retrospective evaluation of 229 patients with MAN. The severity of their disease was analyzed with the Peritoneal Surface Disease Severity Score (PSDSS) on a five-point scale that included: (1) the primary appendiceal tumor, (2) the type of peritoneal dissemination, and (3) the burden of disease.

Multi-institutional retrospective cohort study of spontaneous pneumothorax.

Spontaneous pneumothorax (SP) affects only a subset of patients in a variety of disorders. This multi-institutional study attempted to identify unique clinicopathologic features of spontaneous pneumothorax (SP) in a large cohort. A total of 111 cases from 109 patients were retrieved from 3 institutions over an 11-year period: 27 women, 82 men.

A unique, histopathologic lesion in a subset of patients with spontaneous pneumothorax.

Context: Spontaneous pneumothorax can be idiopathic (primary), or it can occur in association with an underlying predisposing condition (secondary). Spontaneous pneumothorax may be a harbinger of an undiagnosed clinical condition, which may be associated with serious systemic abnormalities, making early recognition and diagnosis important. The pulmonary pathology of some of these disorders has not been fully elucidated.

Inflammatory myofibroblastic tumor of the uterus: a clinicopathologic study of 6 cases emphasizing distinction from aggressive mesenchymal tumors.

Inflammatory myofibroblastic tumor (IMT) is an indolent spindle cell proliferation that can histologically resemble various malignant mesenchymal neoplasms; however, it generally behaves as a benign or locally recurrent tumor. Most IMTs involve the lung, mesentery, omentum, or retroperitoneum. We report the clinical and pathologic features of six IMTs of the uterus, one of which was included in a previous report, and emphasize the histologic and immunohistochemical features that distinguish IMTs from uterine spindle cell neoplasms that require aggressive treatment.

Cell clusters overlying focally disrupted mammary myoepithelial cell layers and adjacent cells within the same duct display different immunohistochemical and genetic features: implications for tumor progression and invasion.

Introduction: Our previous studies detected focal disruptions in myoepithelial cell layers of several ducts with carcinoma in situ. The cell cluster overlying each of the myoepithelial disruptions showed a marked reduction in or a total loss of immunoreactivity for the estrogen receptor (ER). This is in contrast to the adjacent cells within the same duct, which were strongly immunoreactive for the ER.

Osseous involvement in calcific tendinitis: a retrospective review of 50 cases.

Objective: The purpose of this study was to describe the spectrum of radiologic and pathologic manifestations of calcific tendinitis involving bone.

Materials And Methods: We retrospectively reviewed 50 cases of calcific tendinitis involving underlying bone. Clinical data reviewed included patient age and sex and lesion location.

Combined E-cadherin and high molecular weight cytokeratin immunoprofile differentiates lobular, ductal, and hybrid mammary intraepithelial neoplasias.

The terminal duct-lobular unit is the origin of 2 distinct variants of intraepithelial neoplasia traditionally separated into ductal and lobular types based on a combination of cytologic and architectural features. In general, distinction of the fully developed or classic lobular intraepithelial neoplasia (LIN) from various grades of ductal intraepithelial neoplasia (DIN) is not a problem. An increasing number of lesions that appear to have intermediate, overlapping ductal and lobular features are being sent to us for consultation because of the distinctly different clinical implication of the 2 diagnoses.