Soft Tissue Tumors of the Skin

von: Steven D. Billings, Rajiv M. Patel, Darya Buehler

Springer-Verlag, 2018

ISBN: 9781493988129 , 508 Seiten

Format: PDF, OL

Kopierschutz: Wasserzeichen

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Soft Tissue Tumors of the Skin


 

Preface

5

Acknowledgment

6

Contents

7

Contributors

9

1: Introduction and General Approach

10

Selected References

23

2: Ancillary Diagnostic Tests in the Diagnosis of Cutaneous Soft Tissue Neoplasms

24

Basic Principles of Diagnostic Immunohistochemistry

24

Attention to Positive and Negative Internal Controls

24

Evaluation of all Pieces of Tissue on the Entire Slide and Careful Discrimination of Neoplastic from Nonneoplastic Cell Populations

26

The Use of a Panel of Immunostains, Including Both Expected Positives and Negatives for All of the Entities in the Histologic Differential Diagnosis

26

Epithelial Markers

26

Keratins

26

Epithelial Membrane Antigen (EMA)

28

p63 and p40

28

Nerve Sheath Markers

28

S100 Protein

28

SOX10

29

Claudin-1

29

GLUT-1

29

Melanocyte Specific Markers

29

HMB-45

29

Melan-A

31

Tyrosinase

31

Microphthalmia Transcription Factor

31

Markers of Smooth and Skeletal Muscle

31

Desmin

31

Smooth Muscle Actin

31

MyoD1 and Myogenin

33

H-Caldesmon

33

Endothelial Markers

33

CD31

33

CD34

34

Podoplanin (D2-40)

34

FLI1 and ERG

35

vWF (Factor VIII)

37

Histiocytic Markers (CD68, CD163, CD11c, CD4)

37

ALK

37

Markers that Are Generally of Little Value

37

Vimentin

37

PGP9.5

39

Putative Markers of Atypical Fibroxanthoma and/or Superficial Undifferentiated Pleomorphic Sarcoma (CD99, CD10, Procollagen, CD34)

40

Applications of Immunohistochemistry and Fluorescence In Situ Hybridization in Various Differential Diagnoses in Cutaneous Soft Tissue Pathology

40

IHC in the Evaluation of Cutaneous Pleomorphic Spindle Cell Tumors

40

Leiomyosarcoma

42

Atypical Fibroxanthoma/Superficial Undifferentiated Pleomorphic Sarcoma (AFX/SUPS)

43

Other Rare Pleomorphic Spindle Cell Sarcomas that May Involve the Skin

46

IHC in the Differential Diagnosis of “Monomorphic” Spindle Cell Cutaneous Tumors

46

DFSP, CFH, and Related Lesions

46

LGFMS and Perineurioma

48

IHC in the Differential Diagnosis of Epithelioid Malignant Cutaneous Tumors

48

Epithelioid Sarcoma and Epithelioid Endothelial Tumors

48

Melanoma

51

Myoepithelial Tumors

53

IHC in the Differential Diagnosis of Tumors Composed of Small, Round Cells

55

Comments on Specific Round Cell Tumors

56

Other Application of IHC in Cutaneous Mesenchymal Tumors

60

Adipocytic Tumors

60

Atypical Vascular Lesions and Angiosarcomas Arising After Therapeutic Irradiation

62

Selected References

63

3: Mimics of Cutaneous Mesenchymal Tumors

66

Palisading Necrobiotic Granulomas: Granuloma Annulare and Rheumatoid Nodule

66

Clinical Features

66

Pathologic Features

66

Differential Diagnosis

69

Non-mesenchymal Spindle Cell Neoplasms that Mimic Primary Cutaneous Soft Tissue Lesions

70

Sarcomatoid Carcinoma

70

Clinical Features

70

Pathologic Features

71

Differential Diagnosis

73

Spindle Cell, Desmoplastic, and Dedifferentiated Melanoma

74

Clinical Features

74

Pathologic Features

75

Differential Diagnosis

76

Cellular Blue Nevus

79

Clinical Features

79

Pathologic Features

79

Differential Diagnosis

79

Massive Localized Lymphedema

80

Clinical Features

80

Pathologic Features

81

Differential Diagnosis

82

Silicone Granuloma

83

Clinical Features

83

Pathologic Features

84

Differential Diagnosis

85

Mycobacterial Spindle Cell Pseudotumor

86

Clinical Features

86

Pathologic Features

86

Differential Diagnosis

87

Acroangiodermatitis

89

Clinical Features

89

Pathologic Features

89

Differential Diagnosis

89

Bizarre Parosteal Osteochondromatous Proliferation (BPOP, Nora Lesion)

89

Clinical Features

89

Pathologic Features

90

Differential Diagnosis

92

Crystal-Storing Histiocytosis

92

Clinical Features

92

Pathologic Features

92

Differential Diagnosis

93

Erythema Elevatum Diutinum

94

Clinical Features

94

Pathologic Features

94

Differential Diagnosis

95

Metastatic Clear Cell Renal Cell Carcinoma

96

Clinical Features

96

Pathologic Features

96

Differential Diagnosis

96

Selected References

98

4: Benign Fibrous, Fibrohistiocytic, and Myofibroblastic Lesions

100

Keloid

100

Clinical Features

100

Pathologic Features

100

Differential Diagnosis

101

Fibrous Papule (Angiofibroma)

101

Clinical Features

101

Pathologic Features

102

Differential Diagnosis

102

Acquired Digital Fibrokeratoma

102

Clinical Features

102

Pathologic Features

106

Differential Diagnosis

106

Angiofibroma of Soft Tissue

106

Clinical Features

106

Pathologic Features

106

Differential Diagnosis

106

Pleomorphic Fibroma of the Skin

108

Clinical Features

108

Pathologic Features

108

Differential Diagnosis

109

Gardner-Associated Fibroma

109

Clinical Features

109

Pathologic Features

110

Differential Diagnosis

110

Nuchal Fibroma

112

Clinical Features

112

Pathologic Features

112

Differential Diagnosis

113

Calcifying Aponeurotic Fibroma

113

Clinical Features

113

Pathologic Features

113

Differential Diagnosis

113

Elastofibroma

115

Clinical Features

115

Pathologic Features

115

Differential Diagnosis

115

Desmoplastic Fibroblastoma (Collagenous Fibroma)

115

Clinical Features

115

Pathologic Features

115

Differential Diagnosis

116

Sclerotic Fibroma (Storiform Collagenoma)

118

Clinical Features

118

Pathologic Features

118

Differential Diagnosis

118

Fibrous Hamartoma of Infancy

118

Clinical Features

118

Pathologic Features

118

Differential Diagnosis

121

Infantile Digital Fibroma (Inclusion Body Fibromatosis)

122

Clinical Features

122

Pathologic Features

122

Differential Diagnosis

124

Plaque-Like CD34-Positive Dermal Fibroma

124

Clinical Features

124

Pathologic Features

124

Differential Diagnosis

124

Dermatomyofibroma

126

Clinical Features

126

Pathologic Features

126

Differential Diagnosis

126

Fibroblastic Connective Tissue Nevus

127

Clinical Features

127

Pathologic Features

127

Differential Diagnosis

128

Superficial Fibromatoses

129

Clinical Features

129

Pathologic Features

129

Differential Diagnosis

132

Juvenile Hyaline Fibromatosis

133

Clinical Features

133

Pathologic Features

133

Differential Diagnosis

133

Infantile Fibromatosis (Lipofibromatosis)

135

Clinical Features

135

Pathologic Features

135

Differential Diagnosis

135

Benign Fibrous Histiocytoma (Dermatofibroma)

137

Clinical Features

137

Pathologic Features

137

Conventional Benign Fibrous Histiocytoma/Dermatofibroma

143

Lipidized (Ankle-Type) Fibrous Histiocytoma

143

Cellular Fibrous Histiocytoma

143

Aneurysmal and/or Hemosiderotic Fibrous Histiocytoma

143

Atypical Fibrous Histiocytoma/Dermatofibroma with Monster Cells

143

Deep Fibrous Histiocytoma

143

Rare Variants

143

Differential Diagnosis

145

Multinucleate Cell Angiohistiocytoma

145

Clinical Features

145

Pathologic Features

146

Differential Diagnosis

147

Epithelioid Fibrous Histiocytoma

147

Clinical Features

147

Pathologic Features

147

Differential Diagnosis

149

Juvenile (Solitary) Xanthogranuloma

149

Clinical Features

149

Pathologic Features

149

Differential Diagnosis

151

Solitary Reticulohistiocytoma/Multicentric Reticulohistiocytosis

151

Clinical Features

151

Pathologic Features

151

Differential Diagnosis

151

Xanthomas

152

Clinical Features

152

Pathologic Features

153

Differential Diagnosis

153

Tenosynovial Giant Cell Tumor

154

Clinical Features

154

Pathologic Features

154

Differential Diagnosis

154

Superficial Acral Fibromyxoma (Digital Fibromyxoma) and Cellular Digital Fibroma

156

Clinical Features

156

Pathologic Features

156

Differential Diagnosis

156

Cutaneous Myxoma/Superficial Angiomyxoma

158

Clinical Features

158

Pathologic Features

158

Differential Diagnosis

158

Cellular Neurothekeoma

160

Clinical Features

160

Pathologic Features

160

Differential Diagnosis

160

Nodular Fasciitis

163

Clinical Features

163

Pathologic Features

163

Differential Diagnosis

163

Proliferative Fasciitis

167

Clinical Features

167

Pathologic Features

168

Differential Diagnosis

169

Ischemic Fasciitis

169

Clinical Features

169

Pathologic Features

169

Differential Diagnosis

171

Fibroma of Tendon Sheath

171

Clinical Features

171

Pathologic Features

171

Differential Diagnosis

171

Calcifying Fibrous Pseudotumor

174

Clinical Features

174

Pathologic Features

174

Differential Diagnosis

174

Fibroosseous Pseudotumor of Digits

175

Clinical Features

175

Pathologic Features

175

Differential Diagnosis

177

Selected References

177

5: Fibrous, Fibrohistiocytic, and Myofibroblastic Tumors of Intermediate Malignancy

184

Dermatofibrosarcoma Protuberans

184

Clinical Features

184

Pathologic Features

185

Pigmented Variant (Bednar Tumor)

185

Giant Cell Fibroblastoma

185

Myxoid DFSP

186

Atrophic Variant

189

Sclerosing Variant

189

Myoid Variant

189

Granular Cell Variant

190

DFSP with Fibrosarcomatous Transformation

190

Differential Diagnosis

191

Plexiform Fibrohistiocytic Tumor

197

Clinical Features

197

Pathologic Features

197

Differential Diagnosis

197

Angiomatoid Fibrous Histiocytoma

200

Clinical Features

200

Pathologic Features

200

Differential Diagnosis

203

Giant Cell Tumor of Soft Tissue

204

Clinical Features

204

Pathologic Features

205

Differential Diagnosis

206

Superficial CD34-Positive Fibroblastic Tumor

206

Clinical Features

206

Pathologic Features

207

Differential Diagnosis

209

Inflammatory Myofibrolastic Tumor

209

Clinical Features

209

Pathologic Features

209

Differential Diagnosis

211

Selected References

212

6: Malignant Fibrous, Fibrohistiocytic, and Myofibroblastic Tumors

214

Congenital/Infantile Fibrosarcoma

214

Clinical Features

214

Pathologic Features

214

Differential Diagnosis

216

Adult-Type Fibrosarcoma

216

Clinical Features

216

Pathologic Features

217

Differential Diagnosis

218

Low-Grade Fibromyxoid Sarcoma

218

Clinical Features

218

Pathologic Features

218

Differential Diagnosis

220

Sclerosing Epithelioid Fibrosarcoma

221

Clinical Features

221

Pathologic Features

221

Differential Diagnosis

222

Myxofibrosarcoma

223

Clinical Features

223

Pathologic Features

223

Differential Diagnosis

227

Undifferentiated Pleomorphic Sarcoma

227

Clinical Features

227

Pathologic Features

227

Differential Diagnosis

228

Low-Grade Myofibroblastic Sarcoma (Myofibrosarcoma)

229

Clinical Features

229

Pathologic Features

229

Differential Diagnosis

230

Myxoinflammatory Fibroblastic Sarcoma

231

Clinical Features

231

Pathologic Features

231

Differential Diagnosis

231

Atypical Fibroxanthoma and Pleomorphic Dermal Sarcoma

234

Clinical Features

234

Pathologic Features

234

Differential Diagnosis

239

Selected References

240

7: Cutaneous Vascular Lesions

243

Benign Vascular Proliferations of the Skin

243

Capillary Hemangioma (Cherry Hemangioma or Campbell De Morgan Spot)

243

Clinical Features

243

Pathologic Features

244

Differential Diagnosis

244

Pyogenic Granuloma

244

Clinical Features

244

Pathologic Features

245

Differential Diagnosis

245

Infantile Hemangioma

245

Clinical Features

245

Pathologic Features

247

Differential Diagnosis

250

Congenital Nonprogressive Hemangioma

251

Clinical Features

251

Pathologic Features

251

Differential Diagnosis

251

Venous Malformation (So-Called Cavernous/Sinusoidal Hemangioma)

253

Clinical Features

253

Pathologic Features

254

Differential Diagnosis

255

Hyperkeratotic Vascular Lesions:

256

Angiokeratoma

256

Clinical Features

256

Pathologic Features

257

Differential Diagnosis

257

Verrucous Venulocapillary Malformation (Verrucous Hemangioma)

258

Clinical Features

258

Pathologic Features

258

Differential Diagnosis

258

Arteriovenous Hemangioma (Acral Arteriovenous Tumor) and Arteriovenous Malformations

260

Clinical Features

260

Pathologic Features

260

Differential Diagnosis

261

Venous Lake

261

Clinical Features

261

Pathologic Features

261

Differential Diagnosis

261

Acquired Elastotic Hemangioma

261

Pathologic Features

262

Differential Diagnosis

263

Microvenular Hemangioma

264

Clinical Features

264

Pathologic Features

264

Differential Diagnosis

264

Hobnail Lymphatic Malformation (Hobnail Hemangioma, Targetoid Hemosiderotic Lymphatic Malformation, Targetoid Hemosiderotic Hemangioma)

264

Clinical Features

264

Pathologic Features

266

Differential Diagnosis

266

Tufted Angioma

267

Clinical Features

267

Pathologic Features

267

Differential Diagnosis

267

Spindle Cell Hemangioma

269

Clinical Features

269

Pathologic Features

269

Differential Diagnosis

270

Epithelioid Hemangioma (Angiolymphoid Hyperplasia with Eosinophilia)

271

Clinical Features

271

Pathologic Features

271

Differential Diagnosis

273

Cutaneous Epithelioid Angiomatous Nodule

275

Clinical Features

275

Pathologic Features

275

Differential Diagnosis

275

Cutaneous Lymphatic Malformation (Lymphangioma Circumscriptum)

275

Clinical Features

275

Pathologic Features

275

Differential Diagnosis

278

Acquired Progressive Lymphangioma (“Benign Angioendothelioma”)

278

Clinical Features

278

Pathologic Features

278

Differential Diagnosis

279

Papillary Hemangioma

280

Clinical Features

280

Pathologic Features

280

Differential Diagnosis

280

Reactive Vascular Lesions

282

Intravascular Papillary Endothelial Hyperplasia (Masson Tumor)

282

Clinical Features

282

Pathologic Features

282

Differential Diagnosis

282

Reactive Angioendotheliomatosis

284

Clinical Features

284

Pathologic Features

284

Differential Diagnosis

284

Glomeruloid Hemangioma

284

Clinical Features

284

Pathologic Features

284

Differential Diagnosis

284

Bacillary Angiomatosis

287

Clinical Features

287

Pathologic Features

287

Differential Diagnosis

287

Kaposi Sarcoma

287

Clinical Features

287

Pathologic Features

288

Differential Diagnosis

290

Vascular Tumors of Intermediate Malignancy

292

Kaposiform Hemangioendothelioma

292

Clinical Features

292

Pathologic Features

293

Differential Diagnosis

295

Hobnail Hemangioendotheliomas

295

Clinical Features

295

Pathologic Features

296

Differential Diagnosis

296

Composite Hemangioendothelioma

298

Clinical Features

298

Pathologic Features

298

Differential Diagnosis

298

Pseudomyogenic (Epithelioid Sarcoma-Like) Hemangioendothelioma

301

Clinical Features

301

Pathologic Features

301

Differential Diagnosis

301

Malignant Vascular Tumors

303

Epithelioid Hemangioendothelioma

303

Clinical Features

303

Pathologic Features

303

Differential Diagnosis

305

Angiosarcoma

305

Clinical Features

305

Pathologic Features

305

Differential Diagnosis

306

Radiation- and Lymphedema-Associated Vascular Tumors

309

Angiosarcoma

309

Clinical Features

309

Pathologic Features

309

Differential Diagnosis

309

Radiation-Induced Atypical Vascular Lesion

309

Clinical Features

309

Pathologic Features

311

Differential Diagnosis

311

Selected References

312

8: Perivascular Tumors

315

Angioleiomyoma

315

Clinical Features

315

Pathologic Features

315

Differential Diagnosis

316

Glomus Tumor

316

Clinical Features

316

Pathologic Features

318

Differential Diagnosis

318

Glomuvenous Malformation

318

Clinical Features

318

Pathologic Features

319

Differential Diagnosis

319

Glomangiomyoma

319

Clinical Features

319

Pathologic Features

319

Differential Diagnosis

320

Myopericytoma

321

Clinical Features

321

Pathologic Features

321

Differential Diagnosis

323

Myofibroma

324

Clinical Features

324

Pathologic Features

324

Differential Diagnosis

324

Malignant Glomus Tumor and Glomus Tumor of Uncertain Malignant Potential

324

Clinical Features

324

Pathologic Features

326

Differential Diagnosis

328

Selected References

328

9: Adipocytic Tumors

330

Lipoma

330

Clinical Features

330

Pathologic Features

330

Differential Diagnosis

332

Angiolipoma

333

Clinical Features

333

Pathologic Features

333

Differential Diagnosis

333

Spindle Cell Lipoma and Pleomorphic Lipoma

333

Clinical Features

333

Pathologic Features

334

Differential Diagnosis

337

Chondroid Lipoma

338

Clinical Features

338

Pathologic Features

338

Differential Diagnosis

339

Hibernoma

339

Clinical Features

339

Pathologic Features

339

Differential Diagnosis

339

Lipoblastoma

340

Clinical Features

340

Pathologic Features

340

Differential Diagnosis

340

Nevus Lipomatosus

342

Clinical Features

342

Pathologic Features

342

Differential Diagnosis

342

Pleomorphic Liposarcoma

342

Clinical Features

342

Pathologic Features

342

Differential Diagnosis

342

Atypical Lipomatous Tumor

345

Clinical Features

345

Pathologic Features

345

Differential Diagnosis

345

Dedifferentiated Liposarcoma

347

Clinical Features

347

Pathologic Features

347

Differential Diagnosis

347

Myxoid Liposarcoma

348

Clinical Features

348

Pathologic Features

348

Differential Diagnosis

350

Selected References

350

10: Nerve Sheath and Related Tumors

352

Neurofibroma

352

Clinical Features

352

Pathologic Features

352

Differential Diagnosis

354

Schwannoma

356

Clinical Features

356

Pathologic Features

356

Cellular Schwannoma

357

Plexiform Schwannoma

358

Microcystic/Reticular Schwannoma

359

Epithelioid Schwannoma

360

Neuroblastoma-Like Schwannoma

361

Pseudoglandular Schwannoma and Schwannomas with True Glands

361

Schwannoma with Secondary Malignancy

361

Differential Diagnosis

362

Perineurioma

364

Clinical Features

364

Pathologic Features

365

Differential Diagnosis

367

Hybrid Schwannoma/Perineurioma

368

Clinical Features

368

Pathologic Features

369

Differential Diagnosis

369

Granular Cell Tumor

370

Clinical Features

370

Pathologic Features

371

Differential Diagnosis

373

Atypical and Malignant Granular Cell Tumor

374

Clinical Features

374

Pathologic Features

374

Differential Diagnosis

374

Dermal Nerve Sheath Myxoma

375

Clinical Features

375

Pathologic Features

376

Differential Diagnosis

376

Solitary Circumscribed Neuroma (Palisaded Encapsulated Neuroma)

377

Clinical Features

377

Pathologic Features

378

Differential Diagnosis

379

Other Neuromas

379

Traumatic Neuroma

379

Morton Neuroma

379

Pacinian Neuroma

379

Rudimentary Polydactyly (Supernumerary Digit)

379

Meningioma

381

Clinical Features

381

Pathologic Features

381

Differential Diagnosis

381

Malignant Peripheral Nerve Sheath Tumor (MPNST)

382

Clinical Features

382

Pathologic Features

383

Differential Diagnosis

383

Ewing Sarcoma

384

Clinical Features

384

Pathologic Features

385

Differential Diagnosis

387

Selected References

387

11: Genital Mesenchymal Tumors

389

Genital Stromal Tumors

389

Fibroepithelial Stromal Polyp

389

Clinical Features

389

Pathologic Features

390

Differential Diagnosis

390

Cellular Angiofibroma (Angiomyofibroblastoma-Like Tumor of the Male Genital Tract)

390

Clinical Features

390

Pathologic Features

393

Differential Diagnosis

394

Mammary-Type Myofibroblastoma

395

Clinical Features

395

Pathologic Features

396

Differential Diagnosis

396

Angiomyofibroblastoma

398

Clinical Features

398

Pathologic Features

398

Differential Diagnosis

398

Deep Angiomyxoma

398

Clinical Features

398

Pathologic Features

399

Differential Diagnosis

399

Ancillary Studies for Genital Stromal Tumors

400

Immunohistochemistry

400

Genetics

400

RB1/13q14

400

HMGA2/12q14.3

401

Prepubertal Vulval Fibroma

402

Clinical Features

402

Pathologic Features

402

Differential Diagnosis

402

Massive Vulval Edema

403

Clinical Features

403

Pathologic Features

403

Differential Diagnosis

403

Smooth Muscle Tumors of the External Genitalia

404

Clinical Features

404

Pathologic Features

404

Differential Diagnosis

405

Selected References

408

12: Soft Tissue Tumors of Uncertain Histogenesis

410

Epithelioid Sarcoma

410

Clinical Features

410

Pathologic Features

411

Differential Diagnosis

411

Clear Cell Sarcoma

414

Clinical Features

414

Pathologic Features

418

Differential Diagnosis

421

Cutaneous Perivascular Epithelioid Cell Tumor (PEComa)

421

Clinical Features

421

Pathologic Features

422

Differential Diagnosis

423

Ossifying Fibromyxoid Tumor

425

Clinical Features

425

Pathologic Features

425

Differential Diagnosis

428

Pleomorphic Hyalinizing Angiectatic Tumor and Hemosiderotic Fibrolipomatous Tumor

431

Clinical Features

431

Pathologic Features

432

Differential Diagnosis

437

Solitary Fibrous Tumor

438

Clinical Features

438

Pathologic Features

438

Differential Diagnosis

442

Synovial Sarcoma

444

Clinical Features

444

Pathologic Features

445

Differential Diagnosis

449

Alveolar Soft Part Sarcoma

450

Clinical Features

450

Pathologic Features

450

Differential Diagnosis

453

Rosai-Dorfman Disease

453

Clinical Features

453

Pathologic Features

454

Differential Diagnosis

454

Cutaneous Myoepithelial Tumors

456

Clinical Features

457

Pathologic Features

457

Differential Diagnosis

463

Selected References

470

13: Miscellaneous Mesenchymal Tumors: Smooth Muscle, Skeletal Muscle, Cartilaginous, and Osseous Tumors

474

Leiomyoma

474

Clinical Features

474

Pathologic Features

475

Differential Diagnosis

476

Congenital Smooth Muscle Hamartoma

477

Clinical Features

477

Pathologic Features

477

Differential Diagnosis

478

Epstein-Barr Virus-Associated Smooth Muscle Tumors

478

Clinical Features

478

Pathologic Features

478

Differential Diagnosis

479

Leiomyosarcoma

479

Clinical Features

479

Pathologic Features

479

Differential Diagnosis

479

Rhabdomyoma

481

Clinical Features

481

Pathologic Features

482

Differential Diagnosis

482

Rhabdomyomatous Mesenchymal Hamartoma

482

Clinical Features

482

Pathologic Features

482

Differential Diagnosis

484

Cutaneous Rhabdomyosarcoma

484

Clinical Features

484

Pathologic Features

484

Differential Diagnosis

488

Soft Tissue Chondroma

488

Clinical Features

488

Pathologic Features

488

Differential Diagnosis

488

Extraskeletal Myxoid Chondrosarcoma

489

Clinical Features

489

Pathologic Features

490

Differential Diagnosis

491

Osteoma Cutis

491

Clinical Features

491

Pathologic Features

491

Differential Diagnosis

491

Extraskeletal Osteosarcoma

491

Clinical Features

491

Pathologic Features

492

Differential Diagnosis

492

Selected References

493

Correction to: Nerve Sheath and Related Tumors

496

Index

497