Indian Journal of Dermatology
  Publication of IADVL, WB
  Official organ of AADV
Indexed with Science Citation Index (E) , Web of Science and PubMed
 
Users online: 2868  
Home About  Editorial Board  Current Issue Archives Online Early Coming Soon Guidelines Subscriptions  e-Alerts    Login  
    Small font sizeDefault font sizeIncrease font size Print this page Email this page


 
Table of Contents 
CORRESPONDENCE
Year : 2021  |  Volume : 66  |  Issue : 4  |  Page : 416-419
A Case of Dermal Nerve Sheath Myxoma: A Different Tumor from Cellular Neurothekeoma


Department of Dermatology, The Second People's Hospital of Chengdu, Chengdu 610000, Sichuan, China

Date of Web Publication17-Sep-2021

Correspondence Address:
Huimin Meng
Department of Dermatology, The Second People's Hospital of Chengdu, Chengdu 610000, Sichuan
China
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijd.IJD_166_19

Rights and Permissions



How to cite this article:
Meng H, Jiang C. A Case of Dermal Nerve Sheath Myxoma: A Different Tumor from Cellular Neurothekeoma. Indian J Dermatol 2021;66:416-9

How to cite this URL:
Meng H, Jiang C. A Case of Dermal Nerve Sheath Myxoma: A Different Tumor from Cellular Neurothekeoma. Indian J Dermatol [serial online] 2021 [cited 2021 Dec 2];66:416-9. Available from: https://www.e-ijd.org/text.asp?2021/66/4/416/326109




Sir,

A 28-year-old Chinese female presented with a 10-year history of a nodule on her left palm [Figure 1], which was slow-growing. In the previous 3 months, the nodule had presented with tenderness. She denied drainage or bleeding. No previous history of trauma, insect bites, or scarring to the area was elicited.
Figure 1: Firm, skin-color, irregular papule on left palm.

Click here to view


Physical examination revealed a 1 cm nodule of skin color on the left palm with tenderness, which was firm, nonmobile, and irregular margin.

Complete excision and microscopic examination were performed, showing multiple well-defined various sized lobules separated by fibrous septa in the dermis [Figure 2]. The lobules consisted of large amounts of myxoid matrix and a few scattered spindled stellate cells [Figure 3]. No atypical cells or mitotic figures were seen. Immunohistochemical analyses were positive for S100 protein and vimentin. Ki-67 labeling index was <5%, but negative for glial fibrillary acidic protein (GFAP), CD 34, CD10, Carcinoembryonic antigen (CEA), and Pan cytokeratin (PCK) [Figure 4]. A diagnosis of a dermal nerve sheath myxoma (DNSM) was established [Figure 5],[Figure 6],[Figure 7]. The patient was reviewed 11 months later with no evidence of recurrence.
Figure 2: Histopathologic image of lesion showed mutiple well-defined nodules of varying sizes with large amounts of mucin and few scattered cells in dermis (Hematoxylin & eosin x40).

Click here to view
Figure 3: Higher image showing nests of few scattered spindled, stellate cells (Hematoxylin & eosin x200).

Click here to view
Figure 4: Immunohistochemistry panel: positive for S100 (Hematoxylin & eosin x200);

Click here to view
Figure 5: positive for Vimentin (Hematoxylin & eosin x200);

Click here to view
Figure 6: Ki-67 labelling index <5% (Hematoxylin & eosin x100);

Click here to view
Figure 7: negative for GFAP (Hematoxylin & eosin x200); it was also negative for CD34, CD10, CEA, and PCK.

Click here to view


The first nerve sheath myxoma was reported in the literature by Harkin and Reed in 1969, which originated from the peripheral nerve sheath.[1] And the term neurothekeoma (NT) was introduced in 1980 by Gallager and Helwig.[2] With the increasing number of recent immunohistochemical and ultrastructural reports, the data indicate that NSM exhibits true nerve sheath differentiation, whereas no such compelling evidence exists for cell neurothekeomas (CNT). More evidence shows that NSM is different from CNT by histogenesis, morphology, and immunophenotype.

NSM present with solitary, superficial, multinodular masses in the 0.5–2.5 cm size range, a peak incidence in the third and fourth decades of life,[3],[4] and an anatomic distribution that most of them (86%) occurred in the extremities,[4] no gender difference. CNT also occur as pink erythematous, dome-shaped, solitary, asymptomatic papule, mostly during the second and third decades of life, demonstrating a female predominance (1:1.8).[5] The tumors mostly arise on the upper extremities and head and neck.[5] The mean tumor size is 1 cm, and 90% are smaller than 2 cm.[5],[6]

NSM present as well-circumscribed, non-encapsulated, lobulated lesions, exhibiting proliferation of spindle, stellate, and occasionally epithelioid-shaped cells in an abundant myxoid stroma.[4] Meanwhile, no mitosis or necrosis was evident in the lobular.[4] CNT topically had spindled and epithelioid mononuclear neoplastic cells with relatively abundant cytoplasm;[6] most cases were poorly marginated.[5] The majority of CNT also had occasional multinucleated tumor cells. The tumor cells had a strong tendency for whorled growth, and oftentimes, focal fascicular growth was also present. Nuclear atypia and mitosis were common.[5],[6]

NSM was immunoreactive for S100 protein (100%[3]), often positive for GFAP and CD57,[3],[4] and negative for A melanoma monoclonal antibody (NKI)/C3. CNT was positive for NKI/C3 (100%), Neuro-specific enolase (NSE) (89%), CD10, Mit-F, CD68, α-(Smooth muscle actin) SMA, but negative for S100 protein, GFAP, Melan-A, and CD34.[5],[6],[7]

Other histological differential diagnoses of nerve sheath myxoma include myxoid neurofibroma (MN), perineurioma, and superficial acral fibromyxoma. MN typically has collagen bundles within the myxoid stroma, is not mitotic, and lacks a lobular structure.[8] The tumors consisted of interlacing bundles of Schwann cells, which of the nucleus' apex is slightly curved, comma-like, or wavy. They show patchy S100 (Schwann cells) and CD34 (fibroblast) expression simultaneously.[9] Perineuriomas show a whorled fascicular pattern in a myxoid or collagenous stroma. They can be differentiated from NSM on immunohistochemistry as perineuriomas show strong positivity for EMA and are negative for S100, GFAP, and CD34.[10] Superficial acral fibromyxoma is composed of stellate and spindle-shaped fibroblast-like tumor cells with storiform and fascicular or random growth patterns in a variable degree of admixed myxoid or collagenous matrix with lobular pushing or infiltrative margin in the dermis. There is also blood vessel proliferation, and mast cells are present throughout the dermis with mild nuclear atypia. Tumor cells show positivity for CD34, CD99, vimentin, but EMA results are inconsistent.[11]

Surgical excision was the most common treatment for NSM. NSM has a relatively high local recurrence rate (57%)[4] than the local recurrence rate (7.3–7.5%) in CNT.[5],[6]

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
   References Top

1.
Harkin JC, Reed RJ. Solitary benign nerve sheath tumors. Atlas of Tumor Pathology. Washington DC, USA: Armed Forces Institute of Pathology; 1969. p. 29-51.  Back to cited text no. 1
    
2.
Gallager RL, Helwig EB. Neurothekeoma-A benign cutaneous tumor of neural origin. Am J Clin Pathol 1980;74:759-64.  Back to cited text no. 2
    
3.
Kim BW, Won CH, Chang SE, Lee MW. A case of nerve sheath myxoma on finger. Indian J Dermatol 2014;59:99-101.  Back to cited text no. 3
[PUBMED]  [Full text]  
4.
Fetsch JF, Laskin WB, Miettinen M. Nerve sheath myxoma: A clinicopathologic and immunohistochemical analysis of 57 morphologically distinctive, S-100 protein- and GFAP-positive, myxoid peripheral nerve sheath tumors with a predilection for the extremities and a high local recurrence rate. Am J Surg Pathol 2005;29:1615-24.  Back to cited text no. 4
    
5.
Hornick JL, Fletcher CD. Cellular neurothekeoma: Detailed characterization in a series of 133 cases. Am J Surg Pathol 2007;31:329-40.  Back to cited text no. 5
    
6.
Fetsch JF, Laskin WB, Hallman JR, Lupton GP, Miettinen M. Neurothekeoma: An analysis of 178 tumors with detailed immunohistochemical data and long-term patient follow-up information. Am J Surg Pathol 2007;31:1103-14.  Back to cited text no. 6
    
7.
Kao EY, Kernig ML. Neurothekeoma. StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2019 Jan17.  Back to cited text no. 7
    
8.
Kane PM, Gaspar MP, Rekant MS. Solitary myxoid neuro fibroma of the palm. J Hand Microsurg 2015;7:330-1.  Back to cited text no. 8
    
9.
da Costa MD, Hoshino K, Stavale JN, Lanzoni OP, Cavalheiro S, Paiva Neto MA. Unusual intracerebral presentation of a myxoid neurofibroma. World Neurosurg 2017;100:713.e5-8.  Back to cited text no. 9
    
10.
Yadav SK, Singh S, Sarin N, Naeem R, Pruthi SK. Nerve sheath myxoma of scalp: A rare site of presentation. Int J Trichology 2019;11:34-7.  Back to cited text no. 10
    
11.
Ramya C, Nayak C, Tambe S. Superficial acral fibromyxoma. Indian J Dermatol 2016;61:457-9.  Back to cited text no. 11
    


    Figures

  [Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6], [Figure 7]



 

Top
Print this article  Email this article
 
 
  Search
 
  
    Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
    Article in PDF (1,904 KB)
    Citation Manager
    Access Statistics
    Reader Comments
    Email Alert *
    Add to My List *
* Registration required (free)  


    References
    Article Figures

 Article Access Statistics
    Viewed260    
    Printed8    
    Emailed0    
    PDF Downloaded14    
    Comments [Add]    

Recommend this journal