Delayed subaponeurotic fluid collection (DSFC): systematic review and case report

PURPOSE

DSFC (delayed subaponeurotic fluid collection) is a benign pathology associated with the first weeks of life and scarcely described in the literature. Normally characterized by a lack of trauma and/or cranial fracture, it is associated with a history of instrumental delivery and the use of fetal electrodes. Taking it in consideration in the differential diagnosis of neonatal scalp swelling becomes important. The objective of this work is to expand knowledge on this entity: history, clinical characteristics, diagnosis, and treatment.

METHODS

This article describes a new clinical case and conducts a systematic review according to the PRISMA criteria.

RESULTS

Sixty-seven cases are included, they are summarized in a table.

CONCLUSIONS

DSFC appears generally 15-16 weeks after birth. The diagnosis is mainly clinical, based on a history of instrumental birth, labor dystocia, or trauma, and with compatible symptoms and evolution. It may be supported by complementary tests such as ultrasound and or CT of the skull in doubtful cases. The treatment of choice is only conservative, and all cases resolve spontaneously and completely after an average of 4 weeks.

Clinical, Histopathologic and Genetic Features of Rhabdoid Meningiomas

Rhabdoid meningiomas (RM) shows heterogeneous histological findings, and a wide variety of chromosomal copy number alterations (CNA) are associated with an unpredictable course of the disease. In this study, we analyzed a series of 305 RM samples from patients previously reported in the literature and 33 samples from 23 patients studied in our laboratory. Monosomy 22-involving the minimal but most common recurrent region loss of the 22q11.23 chromosomal region was the most observed chromosomal alteration, followed by losses of chromosomes 14, 1, 6, and 19, polysomies of chromosomes 17, 1q, and 20, and gains of 13q14.2, 10p13, and 21q21.2 chromosomal regions. Based on their CNA profile, RM could be classified into two genetic subgroups with distinct clinicopathologic features characterized by the presence of (1) chromosomal losses only and (2) combined losses and gains of several chromosomes. The latter displays a higher frequency of WHO grade 3 tumors and poorer clinical outcomes.