Paget's Disease of the Mandible

Lincoln Sign in a Case of Primary Hyperparathyroidism on 18F-Fluorocholine PET/CT

“…Lincoln sign or black beard sign has been classically demonstrated in monostotic Paget disease with mandibular involvement on 99m Tc-MDP bone scintigraphy. 6 It has also been recorded in a case of carcinoma of tongue with contiguous involvement of the mandible as a lytic sclerotic lesion on 99m Tc-MDP scintigraphy. 7 Another report of Lincoln sign has been made in a case of adenocarcinoma prostate with distant spread to mandible with a coexistent metastatic superscan on 99m Tc-MDP scintigraphy.…”

“…However, it also showed diffusely increased tracer uptake in the mandible resulting in a black beard pattern on MIP image. Lincoln sign or black beard sign has been classically demonstrated in monostotic Paget disease with mandibular involvement on 99m Tc-MDP bone scintigraphy 6 . It has also been recorded in a case of carcinoma of tongue with contiguous involvement of the mandible as a lytic sclerotic lesion on 99m Tc-MDP scintigraphy 7 .…”

Orocrinology: Expanding the horizon

“…Occasionally, Paget disease of bone may present as isolated mandibular involvement to the extent that in the nuclear bone scan this is called “Lincoln sign. "[ 3 ]…”