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Cerebrospinal Fluid Rhinorrhea in a Sino Nasal Low Grade Non Intestinal Adenocarcinoma: Which Association? A Case Report and Literature Review
Radhi M El Hafed1*, Ahmadou A1, Lyoubi H1, Tolba C2, Regragui M2, Oukessou Y3, Rouadi S3, Abada RA3, Roubal M3 and Mahtar M3
1ENT-HNS Department, Casablanca, Morocco
2Anatomopathology Department, Casablanca, Morocco
3ENT-HNS Department, Casablanca, Morocco
Submission: March 02, 2020; Published:April 03, 2020
*Corresponding author:Radhi M El Hafed, ENT-HNS Department, Casablanca, Morocco
How to cite this article: Radhi M El H, Ahmadou A, Lyoubi H, Tolba C, Regragui M, et al. Cerebrospinal Fluid Rhinorrhea in a Sinonasal Low Grade
Non-Intestinal Adenocarcinoma: Which Association? A Case Report and Literature Review. Glob J Oto, 2020; 22(1): 556077.DOI: 10.19080/GJO.2020.22.556077
Sinonasal low- grade non-intestinal-type adenocarcinoma (LG non-lTAC) is an uncommon neoplasm, there is no sexual or racial predilection, nasal obstruction, epistaxis are common symptoms, but in presence of rhinorrhea we have to differentiate between serous nasal secretions and rhinorrhea of cerebrospinal fluid (CSF). The main risk in failing to recognize a CSF leak is meningitis. Well treated the prognosis is excellent. We describe a case of A 60 years old woman who presented a 2 years history of recurrent left- sided epistaxis associated with nasal obstruction and clear rhinorrhea, B2 transferrin test has confirmed the CSF rhinorrhea, imaging by CT SCAN and MRI has suspected a small bony defect in cribriform plate, and the histological analysis concluded to a LG non-lTAC, surgery was performed endoscopic ally with complete extirpation of the tumor and repair of the bone defect; in the short follow up there was no signs of rhinorrhea or epistaxis. The treating physician needs a high index of suspicion and often a great deal of persistence in diagnosing for CSF rhinorrhea even in case of LG non-lTAC. To the best of our knowledge, this is the first case of a LG non-lTAC with cerebrospinal fluid rhinorrhea.
60 years old woman with no history of tobacco use, or exposure to wood dust or other known carcinogens, reported 2 years history of recurrent left- sided epistaxis associated with permanently left nasal obstruction. The patient also reported a clear rhinorrhea evolving for 1 year; his medical history and family history are otherwise unremarkable. Examination of the left nasal cavity found a lobulated hyper vascular mass bleeding on contact, in front of left medial turbinate; the right nasal cavity and the remainder of the physical examination were unremarkable. Computed tomographic scan revealed an expansive process
occupying the left nasal cavity, maxillary sinus and few ethmoidal cells (Figure 1).
To better assess the extent and origin of the mass, a MRI with injection of gadolinium was performed, showing a tumor process of the left nasal cavity extending to the left choana, intensely enhanced after injection, measuring 54*34*16 mm, highlighting in T2 coronal sequences a small communication measuring 2 mm between under arachnoid space and left nasal cavity (Figure 2). The fluid was tested for beta-2-transferrin and found to be positive. The histopathological analysis showed that tumor proliferation is arranged in often back-to-back tubes and papillae, tumor cells are cylindrical with eosinophilic cytoplasm with basal nuclei (Figure 3).
An immunohistochemical study has been carried out, it shows that tumor cells express cytokeratin 7 (Figure 4), with no express of cytokeratin 20 and CDX2. Based on histologic and immunohistochemical features, we diagnosed a LG non-lTAC. Exclusive endoscopic resection was performed, and the tumor was completely excised. The ethmoidectomy is done and the small bony defect has been closed by an overlay free mucosal graft.After discussion with oncologists, we have decided that adjuvant
radiotherapy is unnecessary. Patient is currently 2 months after
surgery and there was no evidence of rhinorrhea or epistaxis.
Primary adenocarcinomas of the Sinonasal tract are
a heterogeneous group , Sinonasal non-intestinal-type
adenocarcinoma (non-lTAC) is an adenocarcinoma of the
Sinonasal tract that does not show the features of a salivary gland
neoplasia and does not have an intestinal phenotype . Lowgrade
non-ITACs do not show sex or racial predilection and are
more common after 50 years of age , in our knowledge there is
no known etiology for LG non-lTACs.
No risk factors, predisposing conditions, or environmental
exposures have been described for non-ITACs  Most patients
presented with unilateral nasal obstruction, recurrent epistaxis;
and the Most site occurred is the nasal cavity . the distinction
between serous nasal secretions and fluids that leak down into the
nose from the brain through a pathologic opening can perplex the
most intrepid physician; and The best contemporary chemical test
at present to diagnosed a CSF rhinorrhea is the beta 2 transferrin,
by electrophoresis or immunofixation .
Diagnostic imaging is recommended by the couple CT scan/
MRI to better define the mass and eventual local extension into
adjacent structures, in our case we have noticed a minimally
meningocele which probably means an invasion of skull of base.
Surgical excision remains the treatment of choice . Many
approaches had been described, thus ranges from craniofacial
resection to endoscopic techniques, Endoscopic approaches to the
skull base and Sinonasal regions offer an excellent visualization
and a complete extirpation of the tumor with lower morbidity
, followed by postoperative radiotherapy in patients with close
margins or incomplete resection , Interestingly in the study of
Aryan Shay , they found that radiotherapy made no difference
in median survival time among patients with low-grade SNAC who
had positive margins after primary surgery. However, in our case
the resection of tumor was complete and was no needed adjuvant
The ethmoidectomy is done to gain wide and easy exposure to
the defect in the roof of the cribriform plate . There are a multiples
variety of techniques described in the literature for closing the
leak, By single or multiple-layer closures with or without bone
or artificial material. The 2017 WHO classification of head and
neck tumors  highlight that LG non-lTACs are predominately papillary and/or tubular features with complex growth, including
back-to-back glands with little intervening stroma. These cells
have eosinophilic cytoplasm and uniform, basally located nuclei.
Mitotic figures are rare; the immunohistochemical analysis
showed that non-ITACs reveal a respiratory-type profile (CK20−,
CK7+, CDX2−, and MUC2−).
For treatment planning and prognosis, it is important
to distinguish low-grade adenocarcinomas from high-grade
adenocarcinomas. LG Non-ITACs tends to be more localized
at presentation and carries a favorable prognosis; only 6% of
patients die from their tumours, usually as a result of loss of local
control . Our case highlights the importance for complete
investigation in present of rhinorrhea and always maintaining a
high clinical index of suspicion for The CSF rhinorrhea even in
case of LG non-lTAC.