Benign renal schwannoma: Case report and literature review.

Renal schwannoma is a very infrequent tumor. It is usually benign and it does not have any specific symptoms or imaging characteristics. Its final diagnosis is usually made after surgery.

[The value of immunohistochemistry using SMARCA4/BRG1 in the diagnosis of small cell ovarian carcinoma hypercalcemic type. A report of two cases].

Small cell carcinoma of ovary-hypercalcemic type is an undifferentiated carcinoma. We describe two cases in women aged 32 and 29. Both presented with large masses and complete surgical extirpation was impossible.

An ulcerated gastric ulcer and pseudotumour with pancreatic affectation associated with immunoglobulin G4-related disease: a case report and literature review.

We report the case of a 67 year old male who presented with a nine year history of a gastric ulcer with symptoms of hematemesis and melena. Histological analysis identified fibrotic lesions and the accumulation of immunoglobulin G4-positive plasma cells with no evidence of malignancy. The lesion extended into the pancreas, where histological lesions and gastric lesions were also observed.

Endometrial stromal nodule of the vaginal wall with a review of vulvovaginal endometrial stromal neoplasms.

•It is reported the first endometrial stromal nodule (ESN) in the vagina.•This is an excepcionall ESN because it was not associated with endometriosis•It was successfully treated by local resection.•Primary vulvovaginal endometrial stromal neoplasms are rare (only 5 reported).

Spinal dermal sinus and pseudo-dermal sinus tracts: two different entities.

Background: Occult spinal dysraphism (OSD) encompasses various conditions. A dermal sinus tract (DST) consists of a duct communicating to the skin with deep structures that carries an important risk of infection. A different lesion consisting of a translucent skin opening and a fibrous tract that lacks a lumen can also be found in OSD.

Embryonal tumor with abundant neuropil and true rosettes (ETANTR): a new distinctive variety of pediatric PNET: a case-based update.

Background: Embryonal central nervous system (CNS) tumors are currently classified into three types: medulloblastoma, atypical rhabdoid/teratoid tumors, and primitive neuroectodermal tumor (PNET). A distinctive subtype of PNET called "embryonal tumor with abundant neuropil and true rosettes" (ETANTR) was reported in 2000.

Discussion: ETANTR is a recently described variety of PNET that combines microscopic features of neuroblastoma and ependymoblastoma, demonstrating areas of fine fibrillary neuropil intermingled with cellular zones and ependymoblastic rosettes.

Foreign body reactions causing spinal cord tethering: a case-based update.

Background: Patients operated on for myelomeningocele (MMC) and lipomeningocele (LMC) can suffer from late functional worsening that, in many cases, is due to spinal cord tethering by the post-repair scarring process.

Illustrative Cases: In this case-based update, we report two patients operated on for MMC and LMC, respectively, who presented the clinical manifestations of spinal cord tethering, which we attributed to severe foreign body reactions to the materials used at their primary back surgery. In the first case, the cause of the tethering was an intense fibrotic scar around the silk suture used at the initial MMC repair, while in the second one, it was due to a fibrotic mesh containing the lyophilized dural graft implanted for LMC surgery.

Massive hemorrhage in hemangioblastomas Literature review.

Massive hemorrhage is a very uncommon event among hemangioblastomas. Forty-four cases have been reported before this review. Thorough analysis of all reported cases on literature was accomplished.

Poorly differentiated primary monophasic synovial sarcoma of the lung.

Primary monophasic synovial sarcoma of the lung is rarely seen in clinical practice. We report the case of a 60-year-old male who underwent a left lower lobectomy for lung sarcoma. The patient received adjuvant therapy after surgery.

Midline cutaneous lumbosacral lesions: not always a sign of occult spinal dysraphism.

Objective: The authors report two unusual cases of extraspinal midline lumbosacral lesions that resembled the usual skin markers of occult spina bifida.

Patients And Methods: The pathological diagnosis of the masses was plexiform neurofibroma and mastocytoma, respectively.

Results: Some lesions, as those we are reporting, although occurring at the lumbosacral midline, do not necessarily belong to occult spinal dysraphism, as was initially suspected.

Rhabdoid meningioma: a new subtype of malignant meningioma also apt to occur in children.

Case Report: The case of a 14-year-old girl who presented with a 2-week history of raised intracranial pressure is reported. A left frontal extra-axial tumor was totally removed, whose histopathologic diagnosis was rhabdoid meningioma (RM).

Discussion: Rhabdoid meningiomas constitute a special malignant phenotype of meningioma that has been recently included in the WHO classification of tumors of the nervous system.

[Fatal evolution of a renal angiosarcoma].

Objectives: Report a new case of renal angiosarcoma treated by surgery and adjuvant chemotherapy with bad results.

Methods: 72-year-old male undergoing right nephrectomy for renal tumor. Pathology reports renal angiosarcoma.

Congenital giant melanocytic nevus with pigmented epithelioid cells: a variant of epithelioid blue nevus.

Epithelioid-cell blue nevus is an unusual cytologic variant of blue nevus that has been recently described mostly in patients with Carney complex, although the lesion may also appear in patients with no evidence of Carney complex. This variant of blue nevus is composed of melanin laden large polygonal epithelioid melanocytes situated within the dermis. The neoplastic cells show no maturation with progressive descent and, in contrast with the usual stromal changes in blue nevi, epithelioid-cell blue nevus exhibits no dermal fibrosis.