Regression of primary gastric B-cell mucosa-associated lymphoid tissue (MALT) lymphoma after eradication of Helicobacter pylori.

OBJECTIVE: primary gastric B-cell lymphoma of the mucosa-associated lymphoid tissue type has been linked to infection of the gastric mucosa with Helicobacter pylori. The eradication of this pathogen with antibiotics can lead to regression of this type of lymphoma. The objective of this study was to describe the clinical, endoscopic and histologic evolution in 6 patients with primary gastric B-cell lymphoma of the mucosa-associated lymphoid tissue type treated with eradication of H. pylori. METHOD: descriptive study of a retrospective case series. Patients with low-grade gastric mucosa-associated lymphoid tissue type lymphoma were initially treated with eradication therapy for H. pylori. We evaluated their clinical, endoscopic and histologic course in sequential follow-up visits after initial therapy. RESULTS: six patients who satisfied all selection criteria were studied. In five of six patients H. pylori was eradicated and the lymphoma showed regression within 6 to 24 months. In one patient transition of low-grade to high-grade gastric lymphoma occurred. CONCLUSIONS: these results, along with similar findings from other studies, suggest eradication of H. pylori should be the initial treatment of choice for low-grade B-cell gastric mucosa-associated lymphoid tissue type lymphoma in the early stages. The most appropriate duration of follow-up is unknown, but prolonged follow-up is indicated to detect recurrences.

[Primary amyloidosis in the bladder: diagnostic and therapeutic update]. / Amiloidosis primaria de localización vesical: actualización diagnóstica y terapéutica.

We describe an additional case of primary amyloidosis of the bladder whose form of presentation warranted a differential diagnosis from carcinoma of the bladder. The diagnosis was made on the histological findings and the immunohistochemical analyses revealed amyloid fibrils that reacted against the light chain lambda antiserum. The treatment of choice was TUR, which resolves the condition in most of the cases. Conservative surgery, however, does not prevent new deposits and undetected residual lesions may persist, which may warrant other complementary procedures in these patients. After the diagnosis has been made, it is important to discard systemic amyloidosis.

[Synchronous and bilateral inverted papilloma of the kidney pelvis. Conservative treatment]. / Papiloma invertido bilateral y sincrónico de pelvis renal. Tratamiento conservador.

Contribution of a new case of inverted papilloma (IP) of the upper urinary tract (UUT) with the idiosyncrasy of being bilateral and synchronic, a fact not found in the reviewed literature, treated with radical surgery on the left side and conservatively on the right one. Discussion on this pathology is addressed, emphasising its benign biological behaviour, which does not eliminate some cases of malignization. Treatment has to be conservative, and so we stress the relevance of defining a suspicion state to make pre- and peri- operative diagnosis in which endourological methods, that allow both direct visualization and the taking of a biopsy, play a preeminent role. Subsequent strict monitoring is essential due to the likelihood of relapse and malignant changes.

[Diagnostic and therapeutic criteria of inverted papilloma]. / Criterios diagnósticos y terapéuticos del papiloma invertido.

Seven cases of inverted papilloma (IP), two located at the UUT level and five in the bladder, one associated to transitional cells carcinoma. Treatment was conservative for the whole series, and neither co-adjunctive therapy or chemoprophylaxis was applied, except for the last case; after an average follow-up of 19.8 months they all show complete remission. A discussion of urinary tract IP is suggested, studying the epidemiology, histology, pathogeny, clinical characteristics and diagnostic methods, of which endourological investigations are the most effective for a reliable diagnosis, since they allow direct visualization and biopsy sampling. Regarding the therapeutic options, the paper highlights the need for conservative surgery due to its benign biological behaviour. A strict control of the patients is necessary due to likelihood of recurrence and malignant transformation.

[Chondroid syringoma in the parotid region. Report of a case]. / Siringoma condroide en región parotídea. Presentación de un caso.

This is a case of a right cervical lump in a 19 years old woman, diagnosed of chondroid Syringoma, by means of Fine Needle Aspiration Cytology, and surgically treated. The AA. analyze clinical, histological, diagnostic and therapeutic aspects of the theme and make a review of the present-day literature.