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Hiyama T, Miyasaka Y, Kuno H, Sekiya K, Sakashita S, Shinozaki T, Kobayashi T. Posttreatment Head and Neck Cancer Imaging: Anatomic Considerations Based on Cancer Subsites. Radiographics 2024; 44:e230099. [PMID: 38386602 DOI: 10.1148/rg.230099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Posttreatment imaging surveillance of head and neck cancer is challenging owing to complex anatomic subsites and diverse treatment modalities. Early detection of residual disease or recurrence through surveillance imaging is crucial for devising optimal treatment strategies. Posttreatment imaging surveillance is performed using CT, fluorine 18-fluorodeoxyglucose PET/CT, and MRI. Radiologists should be familiar with postoperative imaging findings that can vary depending on surgical procedures and reconstruction methods that are used, which is dictated by the primary subsite and extent of the tumor. Morphologic changes in normal structures or denervation of muscles within the musculocutaneous flap may mimic recurrent tumors. Recurrence is more likely to occur at the resection margin, margin of the reconstructed flap, and deep sites that are difficult to access surgically. Radiation therapy also has a varying dose distribution depending on the primary site, resulting in various posttreatment changes. Normal tissues are affected by radiation, with edema and inflammation occurring in the early stages and fibrosis in the late stages. Distinguishing scar tissue from residual tumor becomes necessary, as radiation therapy may leave behind residual scar tissue. Local recurrence should be carefully evaluated within areas where these postradiation changes occur. Head and Neck Imaging Reporting and Data System (NI-RADS) is a standardized reporting and risk classification system with guidance for subsequent management. Familiarity with NI-RADS has implications for establishing surveillance protocols, interpreting posttreatment images, and management decisions. Knowledge of posttreatment imaging characteristics of each subsite of head and neck cancers and the areas prone to recurrence empowers radiologists to detect recurrences at early stages. ©RSNA, 2024 Test Your Knowledge questions in the supplemental material and the slide presentation from the RSNA Annual Meeting are available for this article.
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Affiliation(s)
- Takashi Hiyama
- From the Departments of Diagnostic Radiology (T.H., Y.M., H.K., K.S., T.K.), Pathology and Clinical Laboratories (S.S.), and Head and Neck Surgery (T.S.), National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
| | - Yusuke Miyasaka
- From the Departments of Diagnostic Radiology (T.H., Y.M., H.K., K.S., T.K.), Pathology and Clinical Laboratories (S.S.), and Head and Neck Surgery (T.S.), National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
| | - Hirofumi Kuno
- From the Departments of Diagnostic Radiology (T.H., Y.M., H.K., K.S., T.K.), Pathology and Clinical Laboratories (S.S.), and Head and Neck Surgery (T.S.), National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
| | - Kotaro Sekiya
- From the Departments of Diagnostic Radiology (T.H., Y.M., H.K., K.S., T.K.), Pathology and Clinical Laboratories (S.S.), and Head and Neck Surgery (T.S.), National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
| | - Shingo Sakashita
- From the Departments of Diagnostic Radiology (T.H., Y.M., H.K., K.S., T.K.), Pathology and Clinical Laboratories (S.S.), and Head and Neck Surgery (T.S.), National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
| | - Takeshi Shinozaki
- From the Departments of Diagnostic Radiology (T.H., Y.M., H.K., K.S., T.K.), Pathology and Clinical Laboratories (S.S.), and Head and Neck Surgery (T.S.), National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
| | - Tatsushi Kobayashi
- From the Departments of Diagnostic Radiology (T.H., Y.M., H.K., K.S., T.K.), Pathology and Clinical Laboratories (S.S.), and Head and Neck Surgery (T.S.), National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
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Rocha PHP, Reali RM, Decnop M, Souza SA, Teixeira LAB, Júnior AL, Sarpi MO, Cintra MB, Pinho MC, Garcia MRT. Adverse Radiation Therapy Effects in the Treatment of Head and Neck Tumors. Radiographics 2022; 42:806-821. [PMID: 35302867 DOI: 10.1148/rg.210150] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Whether used as a single modality or as part of a combined approach, radiation therapy (RT) plays an essential role in the treatment of several head and neck malignancies. Despite the improvement in radiation delivery techniques, normal structures in the vicinity of the target area remain susceptible to a wide range of adverse effects. Given their high incidence, some of these effects are referred to as expected postradiation changes (eg, mucositis, sialadenitis, and edema), while others are considered true complications, meaning they should not be expected and can even represent life-threatening conditions (eg, radionecrosis, fistulas, and radiation-induced neoplasms). Also, according to their timing of onset, these deleterious effects can be divided into four groups: acute (during RT), subacute (within weeks to months), delayed onset (within months to years), and very delayed onset (after several years).The authors provide a comprehensive review of the most important radiation-induced changes related to distinct head and neck sites, focusing on their typical cross-sectional imaging features and correlating them with the time elapsed after treatment. Radiologists should not only be familiar with these imaging findings but also actively seek essential clinical data at the time of interpretation (including knowledge of the RT dose and time, target site, and manifesting symptoms) to better recognize imaging findings, avoid pitfalls and help guide appropriate management. © RSNA, 2022.
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Affiliation(s)
- Pedro H P Rocha
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Raphael M Reali
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Marcos Decnop
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Soraia A Souza
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Lorine A B Teixeira
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Ademar Lucas Júnior
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Maíra O Sarpi
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Murilo B Cintra
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Marco C Pinho
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
| | - Marcio R T Garcia
- From the Division of Head and Neck Radiology, Diagnósticos da América SA/DASA, São Paulo, Brazil (P.H.P.R., R.M.R., S.A.S., M.O.S., M.B.C., M.R.T.G.); Division of Head and Neck Radiology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil (M.D.); Departments of Diagnostic Imaging (S.A.S., M.B.C.) and Radiation Therapy (L.A.B.T.), Instituto do Câncer do Estado de São Paulo (ICESP) do HCFMUSP, São Paulo, Brazil; Department of Radiation Therapy, Hospital Santa Paula, São Paulo, Brazil (L.A.B.T.); Division of Head and Neck and Neuroradiology, Grupo São Camilo/ DASA, Maringá, Brazil (A.L.J.); Division of Head and Neck Radiology, Instituto de Radiologia, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (InRad/ HC-FMUSP), São Paulo, Brazil (M.O.S.); and Department of Radiology, UT Southwestern Medical Center, Dallas, Tex (M.C.P.)
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