Anatomía patológica de la patología de tiroides y paratiroides. Sistema Bethesda del diagnóstico citológico de la patología de tiroides / Thyroid and parathyroid gland pathology. The Bethesda System for reporting thyroid cytopathology

INTRODUCCIÓN Y OBJETIVO: La PAAF es el mejor método para el manejo de pacientes con nódulos tiroideos, como método de cribado y para seleccionar a los pacientes que pueden ser sometidos a tratamiento quirúrgico. El objetivo de este artículo es hacer una breve descripción de las categorías diagnósticas del Sistema Bethesda en su segunda edición (2018). SÍNTESIS: El Sistema Bethesda establece 6 categorías diagnósticas: Insatisfactorio /No diagnóstico, Benigno, Atipia de significado Indeterminado/Lesión folicular de significado indeterminado, Neoplasia folicular/Sospechoso de neoplasia folicular, Sospechoso de Malignidad Maligno. Cada categoría lleva implícito el riesgo de malignidad y el manejo de estos pacientes, con lo cual el diagnóstico va a influir en la actitud a seguir. CONCLUSIONES: El Sistema Bethesda permite a los patólogos realizar informes sistematizados y al clínico establecer la actitud a seguir en función de cada categoría diagnóstica

INTRODUCTION AND OBJECTIVE: The FNA is the best method for the management of patients with thyroid nodules, as a screening method and for selecting patients who can undergo surgical treatment. The objective of this article is to make a brief description of the diagnostic categories of the Bethesda System in its second edition (2018). SYNTHESIS: The Bethesda System establishes 6 diagnostic categories: No diagnostic-Unsatisfactory, Benign, Atypia od Undetermined Significance/Follicular Lesion of Undetermined Significance, Follicular Neoplasm/Suspicious for a Follicular Neoplasm, Suspicious for Malignant and Malignant. CONCLUSIONS: The Bethesda System allows pathologists to make systematized reports and the clinician to establish the attitude to follow according to each diagnostic category

Granulomatous appendicitis as an uncommon cause of abdominal pain. Description of a case.

Granulomatous appendicitis is an uncommon cause of acute abdomen. Its etiology can be infectious in nature, noninfectious or idiopathic. We present the case of a patient of whom we got to know about due to an urgent colonoscopy. At the cecum, the appendicular fold was thickened and the mucosa had erythema and nodularity. The diagnosis is made by pathology, as in the majority of cases in this entity. The surgical treatment is curative.

Apendicitis granulomatosa como causa infrecuente de dolor abdominal. Descripción de un caso / Granulomatous appendicitis as an uncommon cause of abdominal pain. Description of a case

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Fracaso renal agudo con complemento bajo: no olvidar la nefritis túbulo-intersticial / Acute renal failure with low complement levels: check for tubulointerstitial nephritis

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[Mesenteric desmoid tumor mimicking a testicular cancer recurrence]. / Tumor desmoide mesentérico simulando una recidiva de cáncer testicular.

OBJECTIVE: Report of one case of desmoid tumor in a patient who had been treated of a testicular seminoma 26 months before, with excision of a retroperitoneal mass and chemotherapy. On followup he presented with a mesenteric abdominal mass which was clinically labeleled as a recurrence of the seminoma. RESULTS: Histologically it was reported as a mesenteric desmoid tumor. Differential diagnosis with gastrointestinal stromal tumor was performed with immunohistochemical studies. CONCLUSIONS: Desmoid tumor is rare. There are few cases reported in patients with history of previous testicular tumor. It should be included in the differential diagnosis of testicular tumor recurrences.

Tumor desmoide mesentérico simulando una recidiva de cáncer tesitular / Mesenteric desmoid tumor mimicking a testicular cancer recurrence

Objetivo: Presentar un caso de un tumor desmoide en un paciente tratado de un seminoma testicular que simulaba una recidiva del tumor testicular. Método: Presentamos el caso de un paciente de 41 años, tratado de un seminoma testicular 26 meses antes, mediante extirpación de una masa testicular retroperitoneal y quimioterapia, que presenta en el seguimiento, una masa abdominal mesentérica que se etiquetó clínicamente de recidiva de seminoma. Resultado: Histológicamente se informa de tumor desmoide mesentérico. Se hace diagnóstico diferencial con un tumor de estroma gastrointestinal mediante el estudio inmunohistoquímico. Conclusiones: El tumor desmoide es un tumor raro. Se han descrito pocos casos en pacientes afectos previamente de tumor testicular. Debe incluirse en el diagnóstico diferencial de las recidivas por tumor testicular (AU)

Objective: Report of one case of desmoid tumor in a patient who had been treated of a testicular seminoma 26 months before, with excision of a retroperitoneal mass and chemotherapy. On follow-up he presented with a mesenteric abdominal mass which was clinically labeleled as a recurrence of the seminoma. Results: Histologically it was reported as a mesenteric desmoid tumor. Differential diagnosis with gastrointestinal stromal tumor was performed with immunohistochemical studies. Conclusions: Desmoid tumor is rare. There are few cases reported in patients with history of previous testicular tumor. It should be included in the differential diagnosis of testicular tumor recurrences (AU)

Fine needle aspiration cytology of focal myositis: a case report.

BACKGROUND: Focal myositis is an unusual inflammatwy lesion of the skeletal muscle first described by Heffizer. It is a benign condition and usually involves the muscles of the limbs. CASE: A man presented with a palpable mass in the left leg of 6 months' duration. Nuclear magnetic resonance of the leg showed a mass in the tibial muscle; the presumptive diagnosis was sarcoma of the muscle. Smears showed inflammatory cells, skeletal muscle fibers with degenerative and regenerative changes, and fibrous tissue, suggesting a diagnosis of focal myositis. An incisional muscle biopsy was performed, confirming the diagnosis. CONCLUSION: Focal myositis should always he considered when aspirating muscle masses because it is a clinical mimic of a neoplasm. The prognosis is good, and all cases reported in the literature were self-limiting and gradually resolved.

[Inflammatory prostatic pseudotumor (fibromyxoid pseudosarcomatous tumor)]. / Pseudotumor inflamatorio de prostata (tumor fibromixoide pseudosarcomatoso).

OBJECTIVES: To report one case of an exceptional benign prostatic pathology and its differential diagnosis with malignant tumors. METHODS: 67-year-old male who suffers an acute urinary retention requiring bladder catheterization and subsequent negative catheter removal tests. Digital rectal examination showed a small prostate, adenomatous, without nodules. PSA was 1.01 ng/ml. The patient underwent transurethral resection of the prostate because of the persistence of urinary retention. RESULTS: Pathologic study reported a hypercellular stroma, with a perivascularly distributed inflammatory infiltrate and myxoid stromal background with slightly atypical fusiform cells. Immunohistochemical studies showed positive staining of fusiform cells for vimentin and histiocytes in the lesion for CD68, and negative staining for cytokeratin. The final diagnosis was prostatic inflammatory pseudotumor. CONCLUSIONS: In spite of being an unfrequent presentation it is important to take this benign lesion under consideration to avoid unnecessary aggressive radical complementary treatments.