Dorsal spine intradural extramedullary hemangiopericytoma: a case report

Introduction: Hemangiopericytomas are rare CNS Neoplasms constituting <1% of CNS tumours. They are more commonly seen in cranium than in spine where they present as Intradural extramedullary in location. They rarely metastasize to Lung and Bone.World Health Organization Classification of Tumors of the Central Nervous System (CNS WHO) assigned the combined term solitary fibrous tumor/ hemangiopericytoma (SFT/HPC) to such lesions in 2016 due to their same genetic makeup. Case report: Our case is about a 61-year-old diabetic male who presented with insidious onset, gradually progressive thoracic backache and asymmetric weakness with tightness and numbness of both lower limbs for last 6 months with no sphincter incontinence and bed bound for last 15 days. Clinically he had asymmetric spastic paraparesis of lower limb. His MRI Dorsal spine showed a 1.5 ґ 2 cm heterogeneously contrast enhancing Intradural lesion at D6-D7 compressing the cord from dorsolaterally with extensive cord edema from C5 to L2. Preoperative diagnosis of Meningioma/ Metastasis was made and patient underwentD5-D7 laminectomy and tumour excision. Intraoperative findings, there was no dural attachment, there were multiple tortuous blood vessels overlying greyish pink, fleshy, suckable, highly vascular, capsulated tumor posterolateral to cord. The superior aspect of tumor was adherent to cord with no clear interface. Tumor was seen separate from Left D7 nerve root. Post operatively patient improved symptomatically and neurologically. His HPE was suggestive of Hemangiopericytoma WHO Grade II (IHC markers CD34 and CD 31 was positive and KI 67% index of 10-15%). Patient has been on follow up and planned for metastatic workup. Conclusion: Spinal Hemangiopericytoma are rare disease with nonspecific radiological features making preoperative diagnosis difficult. Differential diagnosis of hemangiopericytoma should be kept in case of atypical and high - grade radiological features. Gross total resection without compromising the neurological status should be the goal to prevent local recurrence. Proper consensus regarding the follow up and adjuvant therapies of spinal Hemangiopericytoma are still lacking.

Excision of intra-dural dorsal spine meningioma with intra-operative neuromonitoring in a patient with post-pneumonectomy status- an anaesthetic challenge

Post-pneumonectomy status is associated with various anatomical and physiological changes. Intra-operative neuromonitoring allows for safe neurosurgery with minimal neurological damage. Intra-operative neuromonitoring requires that the anaesthetic technique be modified taking into considerations the effects of various anaesthetic agents on evoked potentials to allow for optimal monitoring. We present a case of 65 year old female patient, with post-pneumonectomy status posted for excision of intra-dural D10 meningioma with intra-operative neuromonitoring. The case was successfully conducted with meticulous planning and preparation with complete excision of lesion and no neurological deficit post-operatively.

Pseudolaguvia moinensis, a new benthic miniature Asian catfish (Teleostei: Sisoridae) from Arunachal Pradesh, north-eastern India

A new species of miniature sisorid catfish is described, from the upper Brahmaputra river drainage in northeastern India. The new species is distinguished from all its congeners except P. ferruginea and P. focusa by having an elongate light brown to cream marks either side on ventro-lateral margin just above anus. Further, distinguished from its congeners by the following combination of characters: presence of a W-shaped dark brown band on caudal fin, thoracic adhesive apparatus extending closer to pelvic-fin base, smooth anterior margin of dorsal spine, a narrow V-shaped light brown to cream bands on side of the body, dorsal-spine length (10.7-14.7% SL), dorsal-fin base length (10.7-14.2% SL), pectoral-fin spine length (14.0-21.1% SL), pelvic-fin length (13.5-16.6% SL), caudal peduncle length (14.4-18.2% SL) and depth (7.8-9.9% SL), total vertebrae (30-31), caudal fin with a complete medial hyaline bands towards its anterior end, reaching outer margin of each lobe. Other combination of characters differentiating the new species from its congeners are provided in the respective diagnoses.

ON FUNCTIONAL PURPOSE OF THE TALE SPIKE AND DORSAL SPINE IN PROTOSTRONGYLIDAE LARVAE

This article presents an attempt to analyze the functional purpose of the tail spike and dorsal spine of protostrongylid species. The actual material was obtained from the feces of reindeer (Rangifer tarandus) (the species Elaphostrongylus rangiferi was verified genetically), red deer (Cervus elaphus) and dapple deer (C. nippon) by the Vajda method and has been studied from 2018 to the present day by means of lightfield and dark-field light microscopy, and phase-contrast and scanning electron microscopy. It was found that the tail spike and dorsal spine 1) do not surpass the rest of the cuticle in their density (they are squashed by pressure of the cover slide, shriveled in preparation for scanning electron microscopy, and look uniform in relation to the body of the larva in polarized light); 2) have no openings in the apical areas. On this basis, the versions about the role of spines in episodes of intra- or interspecific competition and defensive function were rejected. The assumptions about the deposition (of substances or ultramicroscopic objects) and about fixation (linking) remain possible. The reliable purpose of the tail spike and dorsal spine of protostrongylid species larvae remains unknown. The further study of a connection between these larvae and their intermediate hosts, gastropods, seems promising.

A new species of alpheid shrimp tentatively assigned to Salmoneus Holthuis, 1955 (Decapoda: Caridea) from the Ryukyu Islands, Japan

A new alpheid shrimp species, provisionally assigned to the genus Salmoneus Holthuis, 1955, is described and illustrated on the basis of three specimens extracted from intertidal soft sediments on seagrass beds at Iriomote Island, southern Ryukyu Islands, Japan. Salmoneus singularis n. sp. is highly distinctive within the genus in having a pair of postorbital spines on the carapace, otherwise showing some affinities to the species of the S. gracilipes Miya, 1972 group. The possession of paired spines on the dorsolateral surface of the carapace is shared with several members of Triacanthoneus Anker, 2010, which is undoubtedly closely related to Salmoneus. However, the new species cannot be placed in Triacanthoneus because of the absence of a mid-dorsal spine on the carapace.

EPIDEMIOLOGICAL ANALYSIS OF DORSAL SPINE INJURIES IN WESTERN INDIA

BACKGROUND: To do epidemiological analysis of the patients with injuries of the spine involving dorsal vertebrae fractures including D1-D9 across western India. This is a cross sectional retrospective analysis of patient with spinal injuries who had D1-D9 level in Civil hospital from January 2018 to December 2019. Our study included 83 patients with detailed history and medical records were analyzed. RESULTS: 83 patients out of which 6:1 M:F ratio & max patients from 30-40 year age group, 53% injured from fall from height, RTA (38%),average injury to hospital delay was 5.7 days , 5 patients of lower limb injury , 2 of upper limb trauma 2 of chest injuries 2 with abdominal and pelvic trauma were associated injuries, average delay in surgery was 4.5 days. ASIA grade at admission was 47 (57%) grade A, 23(27%) grade B, 8(9%) from grade C, 5(7%) of grade D and 0(0%) from grade E. and 46(55%) patients managed conservatively ,37(45%) were managed surgically. The rehabilitation was taken up by 82 (97%) and status of the patient related to bedsores was no bedsores developed in 48 patients (58%) while <10 cm bedsore developed in 19 patients((22%) and >10cm bedsore developed in 16 patients(20%). CONCLUSION : Dorsal spine injuries with SCI required urgent and early recognition and specialized management protocols .The infrastructure in India needs to upgrade awareness, education, patient transportation networks, increase the number of tertiary spinal trauma units spine rehabilitation services might improve spine trauma care.