A Case of Amelanotic Malignant Melanoma of the Lingual Base That Was Diagnosed Based on a Biopsy of Late Metastasis to a Lumbar Vertebra after Being Misdiagnosed as HPV-Positive Oropharyngeal Anterior Wall Squamous Cell Carcinoma

<div>At 20 months after treatment, (a) an endoscopic examination of the pharynx showed that there was no recurrence at the base of the tongue. (b) Lumbar MRI T1W1 showed a metastatic lesion in the L4 vertebra. (c) PET-CT showed multiple metastases in the bilateral lungs, right hilum, right axillary lymph nodes, and some bones.</div>

Case Reports in Otolaryngology

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Figure 4: A Case of Amelanotic Malignant Melanoma of the Lingual Base That Was Diagnosed Based on a Biopsy of Late Metastasis to a Lumbar Vertebra after Being Misdiagnosed as HPV-Positive Oropharyngeal Anterior Wall Squamous Cell Carcinoma 

Figure 4 | A Case of Amelanotic Malignant Melanoma of the Lingual Base That Was Diagnosed Based on a Biopsy of Late Metastasis to a Lumbar Vertebra after Being Misdiagnosed as HPV-Positive Oropharyngeal Anterior Wall Squamous Cell Carcinoma 