Immunohistology was used for the detection of Legionella pneumophila serogroup I in necropsy tissue. Study of pneumonic lung from the recent Stafford outbreak has shown that this technique has a high sensitivity. A retrospective postmortem examination showed that L pneumophila serogroup 1 was an unusual cause of pneumonia in Oxfordshire during the study period. L pneumophila serogroup 1 can be ...

We describe a reversed halo sign in a teenage girl with tuberous sclerosis complex (TSC). Lung manifestations of TSC include lung cysts corresponding to lymphangioleiomyomatosis and small nodules indicating multifocal micronodular pneumocyte hyperplasia (MMPH). However, a reversed halo sign in TSC has never been reported. The lesion was microscopically consistent with MMPH. Immunohistological f...

Chromophobe renal cell carcinoma (ChRCC) is a variant of RCC with certain histological, immunohistological and cytogenetic characteristics. It is believed to arise from the intercalated cells of distal tubules and has a more favourable prognosis than other more common subtypes, clear cell and papillary RCC. Microscopically, neoplastic cells of ChRCC are typically arranged in solid sheets, trabe...

The primary vaginal T-cell non-Hodgkin lymphoma is a rare form of lymphoma. Most of the previously published cases were about B-cell non-Hodgkin lymphomas. We present the case of a vaginal mass in an 82-year-old patient presenting vaginal bleeding. The results of the immunohistological studies of the mass revealed the presence of a cytotoxic T-cell non-Hodgkin lymphoma, which is the least commo...

Whether polyclonal or monoclonal antibodies should be used in immunohistological staining is sometimes a matter of personal preference. Most often, however, the type of antigen and the tissue to be studied will influence this selection (Table 1). Because monoclonal antibodies are of uniform affinity, monoclonal antibodies with high affinity are preferred for immunohistology in oder to avoid los...

This paper describes the use of a panel of seven monoclonal antibodies (selected so as to include reagents reactive with both epithelial and lymphoid cells) for distinguishing between anaplastic carcinoma and high grade lymphoma. Details are given of the immunohistological reactions of these antibodies against a wide range of both normal and malignant tissues and of a number of practical instan...

Four patients with collagen diseases are described, who developed protein losing enteropathy in the course of their disease. Their protein losing enteropathies subsided after treatment with 60 mg/day oral prednisolone. Immunohistological studies of the small intestine showed deposits of C3 in the capillary walls of villi in two patients. Increased capillary permeability due to autoimmune phenom...

Hemangioperycytoma is a rare perivascular tumor that seldom involves the urogenital system. This tumor often appears with an unspecific clinical picture, and sometimes is associated with hematuria or hypertension. Diagnosis is based on a combination of histological and immunohistological findings. We report a case of a 52-year-old patient with renal hemangiopericytoma who underwent surgical tre...

A case of DIDMOAD syndrome (diabetes insipidus, diabetes mellitus, optic atrophy and nerve deafness) is described. There was unusually severe urinary tract dilatation which led to an ileal conduit diversion. Immunohistological study of the bladder wall and ureter revealed a marked diminution in nerve fibres, which may have been primary or secondary to the muscle hypertrophy. The possible pathog...

Drosophila melanogaster can make appropriate choices among alternative flight options on the basis of the relative salience of competing visual cues. We show that this choice behavior consists of early and late phases; the former requires activation of the dopaminergic system and mushroom bodies, whereas the latter is independent of these activities. Immunohistological analysis showed that mush...