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Cazzato G, Colagrande A, Lettini T, Marzullo A, Nacchiero E, Ingravallo G. Granular cell dermatofibroma: A potential diagnostic pitfall. Dermatol Reports 2022; 14:9110. [PMID: 36199906 PMCID: PMC9527676 DOI: 10.4081/dr.2022.9110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 10/13/2021] [Indexed: 12/02/2022] Open
Abstract
Dermatofibroma, also known as “fibrous histiocytoma”, is one of the most common cutaneous soft-tissue tumours. Many variants of dermatofibromas have been described and knowledge of these variations is important to avoid a misdiagnosis of a possibly more aggressive tumour. Histological features of different variants can coexist in the same lesion, but typical common fibrous histiocytoma features are generally found, at least focally, in all cases. However, when cellular changes make up the majority of the lesion, the histopathological diagnosis can become more complex and requires immunohistochemical investigations for a correct nosographic classification. We report on the case of a cutaneous fibrous histiocytoma, “granular cell” variant, found on the left leg of a 74- year-old woman.
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Cutaneous Fibrous Histiocytomas, Ossifying-Variant with Osteoclast-like Giant Cells and Granular Cell-Variant: A Series of Two Unusual Cases with Emphasis on the Differential Diagnosis. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12062977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The ossifying variant and the granular cell variant are rare subtypes of cutaneous fibrous histiocytoma (CFH), characterized by islands of mature metaplastic bone tissue rimmed by multinucleated osteoclast-like giant cells and by large-sized cells with granular cytoplasm and mildly hyperchromatic nuclei with inconspicuous nucleoli, respectively. We herein present two cases of these unusual CFH variants in a 37-year-old woman and in a 38-year-old man, respectively. The main differential diagnoses, including both benign and malignant lesions, are also discussed.
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Cazzato G, Colagrande A, Cimmino A, Marrone M, Stellacci A, Arezzo F, Lettini T, Resta L, Ingravallo G. Granular Cell Dermatofibroma: When Morphology Still Matters. Dermatopathology (Basel) 2021; 8:371-375. [PMID: 34449582 PMCID: PMC8395898 DOI: 10.3390/dermatopathology8030041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/09/2021] [Accepted: 08/10/2021] [Indexed: 02/05/2023] Open
Abstract
Dermatofibroma, also known as "fibrous histiocytoma", is one of the most common cutaneous soft-tissue tumors. Many variants of dermatofibromas have been described, and knowledge of these variations is important to avoid misdiagnosis of a possibly more aggressive tumor. Histological features of different variants can coexist in the same lesion, but typical common fibrous histiocytoma features are generally found, at least focally, in all cases. However, when cellular changes make up the majority of the lesion, the histopathological diagnosis can become more complex and requires immunohistochemical investigations for correct nosographic classification. We present the case of a cutaneous fibrous histiocytoma, "granular cell" variant, found on the left leg of a 74-year-old woman.
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Affiliation(s)
- Gerardo Cazzato
- Section of Pathology, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, 70124 Bari, Italy; (A.C.); (A.C.); (T.L.); (L.R.); (G.I.)
- Correspondence:
| | - Anna Colagrande
- Section of Pathology, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, 70124 Bari, Italy; (A.C.); (A.C.); (T.L.); (L.R.); (G.I.)
| | - Antonietta Cimmino
- Section of Pathology, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, 70124 Bari, Italy; (A.C.); (A.C.); (T.L.); (L.R.); (G.I.)
| | - Maricla Marrone
- Section of Legal Medicine, Interdisciplinary Department of Medicine, Bari Policlinico Hospital, University of Bari Aldo Moro, 70124 Bari, Italy; (M.M.); (A.S.)
| | - Alessandra Stellacci
- Section of Legal Medicine, Interdisciplinary Department of Medicine, Bari Policlinico Hospital, University of Bari Aldo Moro, 70124 Bari, Italy; (M.M.); (A.S.)
| | - Francesca Arezzo
- Section of Ginecology and Obstetrics, Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, 70124 Bari, Italy;
| | - Teresa Lettini
- Section of Pathology, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, 70124 Bari, Italy; (A.C.); (A.C.); (T.L.); (L.R.); (G.I.)
| | - Leonardo Resta
- Section of Pathology, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, 70124 Bari, Italy; (A.C.); (A.C.); (T.L.); (L.R.); (G.I.)
| | - Giuseppe Ingravallo
- Section of Pathology, Department of Emergency and Organ Transplantation (DETO), University of Bari Aldo Moro, 70124 Bari, Italy; (A.C.); (A.C.); (T.L.); (L.R.); (G.I.)
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Fernandes MS, Leitch CS, Al-Qsous W, Biswas A. Desmoplastic stromal changes in cutaneous neural granular cell tumors: An under-recognized histopathologic feature of diagnostic and prognostic importance. J Cutan Pathol 2019; 47:431-438. [PMID: 31859431 DOI: 10.1111/cup.13635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 12/02/2019] [Accepted: 12/16/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND Granular cell tumors (GCTs) are uncommon mucocutaneous and soft tissue neoplasms with distinctive histopathologic appearance but controversial histogenesis. Herein, we report a variant of cutaneous GCT featuring extensive desmoplastic stroma which may result in diagnostic difficulties with mesenchymal proliferations, particularly a dermatofibroma. METHODS Following a recent case of GCT with prominent stromal desmoplasia, we reviewed all cases diagnosed as GCT during the past 10 years accessioned at the dermatopathology unit in a tertiary university hospital. RESULTS Three additional cases with a similar excessive connective tissue were identified out of a total of 49 GCTs. Cytoplasmic granularity was often subtle and focal, S100 expression was weak, and nuclei had a tendency to show spindling in tumor cells entrapped within the desmoplastic areas. Of note, nuclear spindling is one of the criteria used to diagnose an atypical/malignant GCT. CONCLUSION We propose the term "desmoplastic GCT" for these tumors, which not only appropriately addresses the stromal changes but also raises an awareness of GCT being one of the cutaneous tumors which may show stromal desmoplasia. Differential diagnostic difficulties apart, awareness of this phenomenon is important so that desmoplasia and resultant spindling are not linked with potential aggressive behavior.
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Affiliation(s)
| | - Claire S Leitch
- Department of Dermatology, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Wael Al-Qsous
- Department of Pathology, Western General Hospital, Edinburgh, UK
| | - Asok Biswas
- Department of Pathology, Western General Hospital, Edinburgh, UK.,Department of Pathology, University of Edinburgh, Edinburgh, UK
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Abstract
Neurogenic tumors are an uncommon yet important category of soft tissue tumors in children and adolescents because of their frequent association with various genetic syndromes. The heterogeneous cellular composition of the peripheral nerve and the wide metaplastic capacity of the neural crest and its derivatives generate a variety of neoplasms with neurogenic differentiation. This article reviews the clinicopathologic features and differential diagnosis of neurogenic tumors in the first two decades of life, and highlights use of selected ancillary methods for diagnosis.
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Affiliation(s)
- Justin M M Cates
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA.
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Yeh I, Tran DT, Davis TL, Argenyi ZB. An infiltrative variant of non-neural granular cell tumor: a case report. J Cutan Pathol 2009; 36 Suppl 1:46-51. [PMID: 19187104 DOI: 10.1111/j.1600-0560.2008.01214.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dermal non-neural granular cell tumors are rare tumors of indeterminate lineage that typically present as well-circumscribed tumors with nuclear pleomorphism and mitotic activity. We describe a dermal non-neural granular cell tumor with a distinctive growth pattern with granular cells interspersed between collagen bundles. This asymptomatic papule arose on the scapula of a 46-year-old woman and consisted of a mixture of epithelioid and spindled granular cells. The immunohistochemical characteristics were similar to those of previously reported dermal non-neural granular cell tumors. Despite mild nuclear pleomorphism and dispersion of lesional cells among collagen bundles, mitoses were not present and Ki-67 staining indicated a low proliferative rate. In addition to being S-100 protein negative and NKI/C3 positive, our case was positive for PGP9.5 and weakly positive for neuron-specific enolase, a staining pattern similar to what has been observed for cellular neurothekeomas. Our case could represent a dermal non-neural granular cell tumor with unique architecture, a granular cellular neurothekeoma or a granular cell dermatofibroma. As both dermal non-neural granular cell tumor and cellular neurothekeoma are of indeterminate lineage, our case with features characteristic of both entities may suggest a common precursor or lineage for dermal non-neural granular cell tumor and cellular neurothekeoma.
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Affiliation(s)
- Iwei Yeh
- Division of Dermatology, Department of Medicine, University of Washington, Seattle, WA 98195-6524, USA.
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Abstract
Granular cell tumor is a rarely seen disease characterized by a gradually developing nodular lesion, which is difficult to diagnose. It has been thought to originate from Schwann cells. The tumor usually appears in the 4th-6th decades of life, more frequently in women and blacks, and has a multifocal location in 10-25% of the cases. The malignancy potential is 1-3%, with 70-74% of the cases in women. Ninety-eight percent of the cases are S-100 positive. The present paper describes an 18-year-old female patient with benign granular cell tumor. This rarely seen type of tumor was S-100 negative and has been detected in biopsies taken from multiple asymptomatic plaques and maculopapular lesions. They were 0.5-4 cm in diameter, light brown in color, and with clear contours and had been gradually growing on her back the last nine years.
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Affiliation(s)
- Ozer Arican
- Department of Dermatology, Kahramanmaras Sutcu Imam University, Faculty of Medicine, Turkey
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Abstract
A rare subset of distinctive cutaneous nonneural granular cell tumors was described by LeBoit et al in 1991 and termed "primitive polypoid granular-cell tumor." Herein, we report our experience with 13 similar, distinctive nonneural granular cell tumors. Affected patients included 7 males and 6 females ranging in age from 5 to 83 years (mean, 25 years; median, 16 years). These cutaneous lesions involved the back (5 cases), neck, shoulder, thigh (2 cases each), chin, and elbow (1 case each). Clinically described as smooth, nontender cutaneous nodules, the tumors ranged in size from 0.2 to 2.8 cm (median, 0.8 cm) and were present from months to years before excision. Mitoses numbered from 1 to 6 per mm (median, 2). Eight of the lesions were polypoid, based in the papillary dermis with extension to the superficial dermis and associated with an epithelial collarette. Five of the lesions were situated deeper in the reticular dermis with limited extension into the subcutis but clinically were also nodular. All the tumors were well circumscribed and composed of spindled to ovoid cells with abundant granular, eosinophilic cytoplasm and vesicular nuclei with small prominent nucleoli. Immunohistochemistry revealed reactivity only for NKI-C3 (11 of 12 cases), CD68 (7 of 11 cases), and NSE (5 of 10 cases); S-100 protein as well as other melanocytic, epithelial, and myoid markers were uniformly negative. All 13 of the lesions were locally excised and in the 8 cases with adequate follow-up ranging from 13 to 126 months (mean, 68 months; median, 41 months), none has recurred locally. However, one tumor (case no. 11) gave rise to a local lymph node metastasis 25 months after presentation, but the patient is currently disease-free 70 months after lymphadenectomy. These cutaneous granular tumors do not appear to be neural or Schwannian in nature, but their precise line of differentiation is unknown.
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Affiliation(s)
- Alexander J F Lazar
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
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Hong SB, Yang MH, Lee MH, Haw CR. Dermatofibroma‐like Atypical Granular Cell Tumour. Acta Derm Venereol 2005; 85:179-80. [PMID: 15868643 DOI: 10.1080/00015550510036469] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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