Granulomatous tattoo reaction treated with topical allopurinol.

Granulomatous reactions to tattoo ink have been frequently associated with exogenous pigment, although sometimes they are the manifestation of a cutaneous or an underlying systemic sarcoidosis. We report a case of a patient with a granulomatous reaction to a black tattoo pigment treated with 3% topical allopurinol for 3 months. We observed complete resolution without any side-effects.

[Neuroendocrine tumor associated with an intestinal cyst: a case report].

Intestinal (tailgut) cysts or retrorectal cystic hamartomas are rare benign lesions that are included in the category of developmental cystic lesions. Their origin is still uncertain, although several hypotheses have been proposed to explain their development. They are located mainly in the presacral (retrorectal) space and predominately affect middle-aged women (40-60 years).

5-aminolevulinic acid fluorescence guided surgery for resection of cystic meningioma with bone invasion.

Meningiomas have a 5 year recurrence rate of 8%. Histological grade and extent of resection are the two main prognostic factors. Cystic meningiomas represent between 2 and 4% of meningiomas, and the complete resection rate in these cases is 62.

[TFEB-amplified renal cell carcinoma. A case report and review of the literature].

Renal carcinomas associated with translocation of transcription factors of the MiT/TFE family include, according to the latest World Health Organization classification, carcinomas with Xp11 translocation that involve the TFE3 gene and those with translocation t(6;11)(p21;q12) that affect the TFEB gene. Each one of these sub-types have well-defined clinicopathological and molecular characteristics. Currently, progress in molecular techniques has led to the description of neoplasms with molecular changes in these same genes but with alterations different to translocation.

[From tumour to tumour: Metastasis of invasive ductal breast carcinoma to chromophobe renal cell carcinoma].

The coexistence of two or more tumours in the same patient is unusual, but even rarer is the metastasis of one tumour to another. Most reports are based on evidence from autopsies; very few refer to surgical specimens. The most common primary tumour is pulmonary carcinoma and most frequent metastatic tumour is renal clear cell carcinoma.

[Pseudomyogenic hemangioendothelioma in the upper limb: A case report and literature review].

Pseudomyogenic hemangioendothelioma, also called epithelioid sarcoma-like hemangioendothelioma, is a rare, vascular neoplasm usually with indolent behaviour. It was introduced in the latest World Health Organization (WHO) Classification of Tumours of Soft Tissue. We report a case of a 45 year-old patient presenting with a localized, palpable and slightly painful lesion in the left arm.