1 unit = 1 cm. Front view: the patient's right is on the viewer's left, as in a scan. The tumour and its November 2025 starting point are traced from her own MRI scans and fitted onto this generic anatomy; expect a few millimetres of misfit. Everything else is generic anatomy placed from the reports.

Meshes: BodyParts3D, Database Center for Life Science, CC BY 4.0 (generic adult, scaled 0.95).

Updated 24 September 2026: her own scans. The tumour is now traced from the 2 September MRI rather than built by hand, and the white shape inside it is the tissue behind the pituitary on the November 2025 MRI, where it started. Every structure was checked against the real shape and the symptom record. The pons is now red: the report says it is flattened, her scans show its front pushed back 7 to 8 mm since November, and this page wrongly said her limbs were unaffected when right arm and leg symptoms were recorded on 4 and 5 September. The pituitary is now amber (the tumour comes up through the floor of its saddle). The sphenoid sinus is now confirmed on the scan, and the left sixth nerve palsy now has a likely direct cause. The tumour does not reach the nasopharynx or the swallowing and voice nerves. A pointer for the specialists, not a radiology report. Previously, 17 September 2026: the first real image. Until today every shape here came from the written report or from symptoms. One axial slice of the 2 September MRI has now been seen (3D T1 mDIXON after gadolinium, Royal Cornwall Hospital), and the tumour has been reshaped against it. On that slice the enhancing mass is roughly 24 mm across by 35 mm front to back, so the model was too wide at the level of the clivus itself and the lateral lobes have been pulled in; the lobe reaching into the right cavernous sinus has been lifted, because the widening the report describes happens above this level rather than at it. What the slice confirms rather than changes: the mass is multilobulated with the bubbly, septated enhancement that is characteristic of a chordoma, it crosses the midline, the prepontine cistern is effaced, and the front of the brainstem is flattened against it. It is still one slice, photographed off a screen, so every number here carries about a fifth either way. Previously, 16 September 2026, from symptoms only. There has been no scan since 2 September, so nothing here measures the tumour and nothing here says it has grown. What changed is the weight of evidence from signs reported since 11 September. The sphenoid sinus and the back of the nose move from amber to red: six local signs now point that way (blocked right nostril, pain behind the nose, nose pressure lying down, a five minute blood taste, a recalled sensation of fluid, and a right ear hum). The nasopharynx and eustachian tube are new on the map, added because the ear hum is on the same side as the blocked nostril. The right jaw division of the fifth nerve is new and amber, on increased right jaw sensitivity, which points below the cavernous sinus but points weakly. The prepontine cistern now carries the straining sign, which turns out to date from about mid August and predates the left sixth nerve palsy. Read every red as "the signs point here and here is the test that settles it", not as an imaging finding. Corrected later the same morning, after her partner set out the full eighteen month history: the jaw sensitivity is not a new territory, jaw pain dates to late 2025, which reads the opposite way; and the lower cranial nerves go from green to amber, because an osteopath noticed her voice had changed in May 2026 and nobody had put that on this map. Still schematic: the cavernous sinuses, the fifth nerves, the eustachian tubes, the sphenoid sinus and the airway. The clivus, the skull and the brain structures are real bone and real anatomy from a body scan; the tumour is a seven-lobule model, 3.8 cm at its widest, placed where the report puts the growth.