scholarly journals Histological and Ultrastructural Description of Benign Adipocytic Tumors in Farmed Striped Sea Bream (Lythognathus mormyrus)

Animals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3413
Author(s):  
Massimo Orioles ◽  
Marco Galeotti ◽  
Pierpaolo Patarnello ◽  
Stefano Pizzolitto ◽  
Donatella Volpatti
Keyword(s):  
Spindle Cell ◽  
Giant Cells ◽  
Collagen Fibers ◽  
Sea Bream ◽  
Spindle Cell Lipoma ◽  
Marine Aquaculture ◽  
Spindle Cells ◽  
Adipocytic Tumors ◽  
Abundant Cytoplasm ◽  
The Masses

Cutaneous neoplasms affecting wild striped bream (Lythognathus mormyrus) have been recorded after their introduction in a marine aquaculture farm in the Adriatic Sea. The tumors were evident on 24% of the reared fish, showing single or multiple nodules, with a diameter ranging between 0.5–4.0 cm. Histologically, all the neoplastic lesions were located in the stratum spongiosum of the dermis and were surrounded by a thin capsule of connective tissue. The tumors were predominantly composed of adipocytes grouped and surrounded by a thin net of fibroblasts and collagen fibers. In some lipomas a mixture of adipocytes and uniform spindle cells were also observed. Fibroblasts and collagen fibers, or spindle cells, showing few mitotic figures were mainly observed in other nodules. Three of the tumors showed bands of cells with elongated nuclei. Five neoplasms differed from the classic spindle cell lipoma due to the presence of scattered giant cells. These cells presented acidophilic abundant cytoplasm with multiple hyperchromatic nuclei showing a concentric “floret-like” arrangement. The tumors were further characterized by ultrastructural observations that allowed ruling out the presence of virus-like particles within the lesions. Histological features of the masses lead to the identification of four prevalent patterns of neoplasms: lipoma, fibrolipoma, spindle cell lipoma (SCL), and atypical spindle cell-like lipoma (ASCL). The different neoplasms could arise from the transformation of mesenchymal cells of dermal origin. To the author’s knowledge, this is the first report describing key differential histological and ultrastructural features of these neoplasms in striped sea bream.

Sarcomatoid Carcinoma of the Small Intestine: A Case Report and Review of the Literature

2004 ◽  
Vol 128 (8) ◽  
pp. 918-921
Author(s):  
Michelle Reid-Nicholson ◽  
Muhammed Idrees ◽  
Giorgio Perino ◽  
Prodromos Hytiroglou
Keyword(s):  
Small Bowel ◽  
Epithelial Membrane Antigen ◽  
Spindle Cell ◽  
English Literature ◽  
Sarcomatoid Carcinoma ◽  
Giant Cells ◽  
Intestinal Wall ◽  
Cytokeratin 20 ◽  
Spindle Cells ◽  
Immunohistochemical Stains

Abstract Sarcomatoid carcinoma of the small bowel is rare; to our knowledge, 19 cases have been reported to date in the English literature under several names. We report an additional case occurring in the jejunum of a 55-year-old man. The tumor was a polypoid 7.5-cm mass, which infiltrated the full thickness of the intestinal wall and the serosa of an adhesed loop of small bowel. On microscopic examination, the neoplasm was composed of sheets of spindle cells; focally, an anaplastic component was present, including tumor giant cells with bizarre nuclei. On immunohistochemical stains, tumor cells were positive for cytokeratin 7, cytokeratin AE1/AE3, vimentin, and focally, epithelial membrane antigen. No staining for cytokeratin 20 was found. Sarcomatoid carcinoma must be kept in mind in the differential diagnosis of malignant spindle cell tumors of the small bowel. As consensus regarding the terminology of these rare tumors is being reached, immunohistochemical stains are essential for accurate diagnosis.

scholarly journals Left Supraclavicular Spindle Cell Lipoma

2010 ◽  
Vol 2010 ◽  
pp. 1-4 ◽  
Author(s):  
Oladejo Olaleye ◽  
Bertram Fu ◽  
Ram Moorthy ◽  
Charles Lawson ◽  
Myles Black ◽  
...  
Keyword(s):  
Spindle Cell ◽  
Excisional Biopsy ◽  
Neurological Deficits ◽  
Excision Biopsy ◽  
Low Grade ◽  
Spindle Cell Lipoma ◽  
Rare Presentation ◽  
Spindle Cells ◽  
Immuno Histochemistry ◽  
Rare Benign Tumour

Background. Spindle cell lipoma (SCL) is a benign lipomatous tumour, typically occurring in the posterior neck, shoulder or upper back of elderly males. They compose of fat, CD34 positive spindle cells, and ropey collagen on a myxoid matrix. This case highlights a rare presentation of SCL and the need for pre-operative diagnosis.Case Report. A 63-year-old gentleman presented with a pre-existing left supraclavicular mass that had recently increased in size. FNA and CT Scans were performed and results discussed in the mutidisciplinary team meeting. Excisional biopsy was recommended.Radiology. CT neck showed a left supraclavicular mass of fatty density with fine internal septations. A low-grade liposarcoma could not be excluded.Histopathology. FNA was indeterminate. Histology of specimen showed bland spindle cells with no evidence of malignancy. Immuno-histochemistry showed SCL with CD34 positivity and negative staining on CDK4 and p16.Management. Excision biopsy of the mass was performed which was technically difficult as the mass invaginated around the brachial plexus. The patient recovered well post-operatively with no neurological deficits.Conclusion. Spindle cell lipoma is a rare benign tumour and a pre-operative diagnosis based on the clinical context, imaging and immuno-histochemistry is crucial to management.

Atypical Spindle Cell Lipomatous Lesion Resected From Patient With History of CLL

2020 ◽  
Vol 86 (9) ◽  
pp. 1208-1211
Author(s):  
Chase J. Wehrle ◽  
J. Will Daigle ◽  
Asad Ullah ◽  
Suash Sharma ◽  
Edmond F. Ritter ◽  
...  
Keyword(s):  
Spindle Cell ◽  
Lymphocytic Leukemia ◽  
Left Shoulder ◽  
Spindle Cell Lipoma ◽  
Atypical Lipomatous Tumor ◽  
Lipomatous Tumor ◽  
Adipocytic Tumors ◽  
History Of ◽  
Pathologic Analysis ◽  
Mdm2 Amplification

Atypical spindle cell lipomatous neoplasm, also known as well-differentiated spindle cell liposarcoma, represents a newly discovered entity of adipocytic tumors. Recent research has shown this tumor variant to be more related to spindle cell lipoma, rather than the originally hypothesized atypical lipomatous tumor spectrum. Here we present a case of a 58-year-old man with a history of chronic lymphocytic leukemia with an enlarging mass on the posterior left shoulder, initially hypothesized to be a benign lipoma. However, magnetic resonance imaging showed a large, multiseptated, heterogeneous mass concerning for soft tissue sarcoma. After resection, pathologic analysis showed cells closely resembling spindle cell lipoma, with additional cellular and fascicular zones containing lipoblasts and mitotic figures. Molecular analysis showed no MDM2 amplification. This lack of amplification indicates this tumor is distinctly different from an atypical lipomatous tumor, which characteristically displays MDM2 amplification. However, tumor expression of RB1 was normal. The majority of atypical spindle cell lipomatous neoplasms are associated with RB1 deletions. We conclude that we have a unique example of an atypical spindle cell lipomatous tumor.

scholarly journals A 37 mm Spindle Cell Lipoma on the Floor of the Mouth

2019 ◽  
Vol 2019 ◽  
pp. 1-4 ◽  
Author(s):  
Eve Malthiery ◽  
Valérie Costes-Martineau ◽  
Marie-Alix Fauroux ◽  
Jacques-Henri Torres
Keyword(s):  
Oral Cavity ◽  
Local Anesthesia ◽  
High Frequency ◽  
Spindle Cell ◽  
Spindle Cell Lipoma ◽  
Functional Consequence ◽  
Histological Features ◽  
Floor Of The Mouth ◽  
Spindle Cells ◽  
Male Patients

Spindle cell lipoma (SCL) is a rare variety of lipoma that mostly arises in male patients and rarely affects the oral cavity. The floor of the mouth is an uncommon site for SCL, and very few cases have been reported in this location. A case of SCL is reported in a 70-year-old woman who had noticed a swelling of the floor of the mouth without any functional consequence. Both ultrasonography and RMI suggested a diagnosis of ranula, whereas clinical palpation showed a nonfluctuant mass. The lesion was excised under local anesthesia. A 37×32 mm encapsulated yellow mass was removed. Histological features (mature adipocytes and CD34+ spindle cells) led to a diagnosis of SCL. Medical imaging assessment of this lesion could have been influenced by the high frequency of the ranulas in the floor of the mouth. This case appears to be quite infrequent because of its location (floor of the mouth), its size (over 3.5 cm), and the patient’s gender (female).

MIMICKING SOFT TISSUE TUMOUR- SPINDLE CELL LIPOMA

2021 ◽  
pp. 111-113
Author(s):  
Lahari Sampangi Ram Reddy ◽  
Indira Galidevara ◽  
Kannan R
Keyword(s):  
Spindle Cell ◽  
Complex Mixture ◽  
Variable Number ◽  
Soft Tissue Tumour ◽  
Spindle Cell Lipoma ◽  
Posterior Aspect ◽  
Spindle Cells ◽  
Tissue Tumour ◽  
The Right ◽  
Slow Growing

Spindle cell lipomas (SCL) are slow-growing benign adipocyte tumours that are most commonly seen in (1) the upper back, posterior aspect of the neck, and shoulders . Both genders are affected, but it is more (1) prevalent in males between the ages of 40 and 70 . Spindle cell lipoma is a benign tumour that is frequently confused with (1) liposarcoma. SCLs account for approximately 1.5 percent of all lipomatous tumours reported, making them uncommon . They (2) have a morphology similar to other benign and malignant fatty/spindle cell or myxoid lesions . Microscopically, it is a complex mixture of lipocytes and uniform spindle cells embedded in a mucinous matrix and traversed by (2) a variable number of birefringent collagen bres . Due to the unusual presentation and similar morphology of tumours, early diagnosis is critical; thus, diagnosis is based on clinical examination and conrmed by histopathological ndings. Because SCL has a favourable prognosis, wide local (1) excision is the treatment of choice . This is a case report of a 52-year-old male with a similar presentation in the right upper limb.

scholarly journals Distinguishing a Rare Variant of Lipidized Dermatofibroma from Nonlipidized Dermatofibromas in a Patient with Hypothyroidism and Alopecia Areata

2017 ◽  
Vol 9 (2) ◽  
pp. 53-56
Author(s):  
Farah Abdulla ◽  
Heather Peck ◽  
Ashley Feneran ◽  
Ashley Jenkins ◽  
Katherine Mullersman
Keyword(s):  
Alopecia Areata ◽  
Cellular Proliferation ◽  
Foam Cells ◽  
Giant Cells ◽  
Collagen Fibers ◽  
Factor Xiiia ◽  
Spindle Cells ◽  
Dermal Collagen ◽  
History Of ◽  
Biopsy Examination

Abstract Introduction. Lipidized dermatofibromas represent rare and often underrecognized variants of dermatofibromas. Histologically, dermatofibromas are composed of fibroblast-like spindle cells, foam cells, giant cells, siderophages, lymphocytes, capillaries, collagen fibers, and hyaline dermal collagen fibers. Lipidized dermatofibromas are characterized by numerous foam cells, Touton giant cells, and hyalinized wiry collagen in the stroma. Case report. We present a case of a 31-year-old woman with a history of hypothyroidism and alopecia areata, presenting with an enlarging 8 mm, firm erythematous nodule on her upper-mid back. Biopsy examination showed a cellular proliferation of spindle cells with peripheral collagen trapping and cholesterol clefts with associated foam cells and sclerosis, staining weakly positive for Factor XIIIa and negative for CD34. The diagnosis of a benign lipidized dermatofibroma was rendered. Conclusion. Lipidized dermatofibromas are rare histologic variants of dermatofibromas, biologically indolent, and should be distinguished from other cutaneous foamy histiocytic lesions, particularly xanthomas, which may alter patient management.

scholarly journals Spindle Cell Lipoma: A Case Report And Review Of Literature

2013 ◽  
Vol 10 (2) ◽  
pp. 92-95 ◽  
Author(s):  
P Chandrashekar ◽  
M Jose ◽  
M Dadhich ◽  
L Chatra ◽  
V Holla
Keyword(s):  
Medical Journal ◽  
Case Report ◽  
Spindle Cell ◽  
Histopathological Examination ◽  
English Literature ◽  
Review Of Literature ◽  
Spindle Cell Lipoma ◽  
Collagen Fibres ◽  
Spindle Cells ◽  
Rare Lesion

Oral spindle cell lipoma is a rare lesion and until now only 26 cases have been reported in English literature. In this article we report a case of oral spindle cell lipoma presented to our institution in July 2011, as an asymptomatic solitary growth of the buccal mucosa in a 58 year old male patient. On histopathological examination the lesion exhibited an admixture of adipocytes and spindle cells with collagen fibres and numerous mast cells. Kathmandu University Medical Journal | Vol.10 | No. 2 | Issue 38 | Apr – June 2012 | Page 92-95 DOI: http://dx.doi.org/10.3126/kumj.v10i2.7353

scholarly journals S-100 protein expressing spindle cells in spindle cell lipoma: a diagnostic pitfall

2016 ◽  
Vol 469 (4) ◽  
pp. 435-438 ◽  
Author(s):  
T. Mentzel ◽  
A. Rütten ◽  
M. Hantschke ◽  
J. L. Hornick ◽  
T. Brenn
Keyword(s):  
Spindle Cell ◽  
Spindle Cell Lipoma ◽  
Diagnostic Pitfall ◽  
Spindle Cells ◽  
S 100

Spindle Cell Lipoma of the Breast

1996 ◽  
Vol 37 (3P2) ◽  
pp. 893-895 ◽  
Author(s):  
D. N. Smith ◽  
C. M. Denison ◽  
S. C. Lester
Keyword(s):  
Spindle Cell ◽  
Spindle Cell Lipoma ◽  
Rare Type ◽  
Palpable Mass ◽  
Spindle Cells

A case of spindle cell lipoma of the breast found on mammography in a 53-year-old woman is presented. This rare type of tumor has been previously reported on only after its presentation as a palpable mass. Radiographically it appears as a well-circumscribed mass. Ultrasonographically it appears as a homogeneously hyperechoic nodule. Histologically these lesions are composed of spindle cells intermingled with adipocytes.

scholarly journals Cellular Angiofibroma of the Prostate: A Rare Tumor in an Unusual Location

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Inez Wyn ◽  
Maria Debiec-Rychter ◽  
Ben Van Cleynenbreugel ◽  
Raf Sciot
Keyword(s):  
Spindle Cell ◽  
Prostatic Hyperplasia ◽  
Rare Tumor ◽  
Spindle Cell Lipoma ◽  
Soft Tissue Tumours ◽  
Cellular Angiofibroma ◽  
Retropubic Prostatectomy ◽  
Spindle Cells ◽  
Unusual Occurrence ◽  
Prostatic Gland

We report the unusual occurrence of a cellular angiofibroma in prostatic tissue. In this case, a 84-year-old man presented in the emergency room with urinary retention. Ultrasound revealed an enlarged prostate, which was suggestive for benign prostatic hyperplasia. The patient was treated with a Millin retropubic prostatectomy. Macroscopically the prostate contained multiple circumscribed nodules. Microscopic examination of the tumor showed the appearance of cellular angiofibroma, consisting of bland spindle cells and prominent, hyalinized vessels. The diagnosis was supported by FISH, which revealed monoallelic loss ofRB1/13q14 region, as seen in spindle cell lipoma, (extra-) mammary myofibroblastoma, and cellular angiofibroma. Cellular angiofibromas are rare, benign soft tissue tumours and were never reported in the prostatic gland.

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