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J García Tamayo

Publications and source records attributed to J García Tamayo.

9 recordsLinked to original sources
PubMed1999

Cotyledonoid dissecting leiomyoma (Sternberg tumor): an unusual form of leiomyoma.

Smooth muscle tumors are the most common neoplasms of the female genital tract. While most are usually easy to diagnose, several variants pose considerable diagnostic difficulties. Recently, a new form of uterine smooth muscle tumor was described that has an infiltrative character, which was named "cotyledonoid dissecting leiomyoma" or "Sternberg tumor" due to its macroscopic similarity to the gross architecture of the placental cotyledon. This report, the second such of this tumor, describes the macroscopic, microscopic, immunohistochemical and ultrastructural features of one of these unusual cases.

Adult↗
PubMed1998

[An ultrastructural evaluation of Pneumocystis carinii].

The pneumocystis carinii (PNC) is a challenge, because its taxonomy has not been completely explained. PNC seems to be a chimera with fungal and parasitic characteristics. The objective of the present study is to analyze the different stages observed in PNC using transmission electron microscopy in order to correlate them with bibliographic reports regarding a possible taxonomic classification. The trophic stage was the form most frequently encountered in alveolar spaces and their organisms varying in size and shape from 6 to 20 microns. Cyst were round or oval, with diameters ranging between 4 and 12 microns, showing four intracystic bodies were individually limited by a membrane. Connections between the membrane of intracystic bodies and junctions between them and the inner cell membrane of the cyst wall were also observed. Our ultrastructural findings appear to be in agreement with several reports which considered PNC among the fungi, most likely related them to the non-gemating Ascomycetes.

Autopsy↗
PubMed1997

[Pulmonary alveolar proteinosis: ultrastructural study of 4 cases].

Pulmonary Alveolar Proteinosis (PAP) is a rare and diffuse lung disease characterized by the abnormal deposition of PAS positive, lipoproteinaceous material in the alveolar spaces. It has been related, mainly, to alterations in the immune state and to secondary infections. We studied four cases of PAP diagnosed by light microscopy. In two cases we were able to demonstrate disseminated Histoplasmosis related to immunodeficiency states (AIDS and malnutrition), one case with Pneumocystis carinii infection and AIDS, and one case with no related pathology. Granular and electron dense material, concentric myelin figures, and variable-sized osmiophilic bodies were observed by electron microscopy. We found yeast-like structures, trophozoites and cysts in the alveolar spaces, in the Histoplasmosis and Pneumocystic carinii infection cases, respectively. In one of our cases, the circulating neutrophils showed crystalloid inclusions in the nucleus. PAP should be considered in the differential diagnoses of patients with pulmonary infiltrates.

Adult↗
PubMed1994

[Cell death].

Explore the source record for details and available documents.

Cell Death↗
PubMedDate not supplied

[A morphological study of the liver in the acquired immunodeficiency syndrome. An analysis of 69 cases].

The morphologic findings in the liver of 69 autopsy cases with had died of AIDS are presented. The morphologic changes were represented by the presence of opportunistic germs (Histoplasma capsulatum, Mycobacteria, Cryptococcus neoformans and CMV). Other alterations found were fatty changes, portal fibrosis, dilated and congested sinusoids. We did not find Kaposi's sarcoma in the liver and only one case of lymphoblastic lymphoma was seen observed.

AIDS-Related Opportunistic Infections↗
PubMedDate not supplied

[Sickle-cell anemia. The liver lesions. A clinical, morphological and ultrastructural study of 21 cases].

Liver changes in patients with sickle cell anemia, for some authors, is a common finding and is hot in relation with the severity of the anemia. The grade of liner disfunction or malfunction is related with ischemia and, there exists probable, slowing of intrahepatic circulation secondary to sinusoidal obstruction due to masses of sickle cells and to the hypertrophy of Kupffer cells. In this paper, clinical morphologic and ultrastructural findings of 21 cases of SS and SA, hemoglobinopathies are presented. Sixty percent were females and forty percent were males with ages between 18 and 46 years. The most frequent microscopic findings were sinusoid distention followed by hypertrophy of Kupffer cells and inflammation. Areas of necrosis, fatty changes and iron deposits were also seen.

Adolescent↗